CTX S762A (Silver) 17" LCD Monitor Logo

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Problem with CTX S762A (Silver) 17" LCD Monitor

The monitor turns off and on repeatedly.

It comes on and shows the picture but then turns off and comes back on and shows the picture and turns off again repeatedly. It seems to keep doing this forever. It is getting power and is connected to the computer or it wouldn't show the picture.

Posted by avatar on Feb 26, 2006

    • By avatarRomeril17 Apr 14, 2009

    • My HPL1706 makes strange buzzing noises and then turns off ( green light still on ) after several attempys turning it back on, it comes good for about 20mins, then the noise returns!!!!!!

    • By avatarmaholdren Apr 05, 2009

    • my tv, when i first turn it on, it flashes on and off rapidly

    • By avatarkriton Mar 23, 2009

    • comes on for 1-2 seconds then goes off.

      after few minutes on again for 1-2 seconds then off again

    • By avatarGuest Mar 18, 2009

    • I ahve the exact same problem! It started right after I signed up for the Omni Tech service...how coincidental!

    • By avatarGuest Mar 02, 2009

    • 5year old 17" dell monitor, swithces on and off. Any soulutions?

    • By avatarGuest Feb 03, 2009

    • the computer blinks on ff repeatedly

    • By avatarGuest Feb 01, 2009

    • i can close the door by keep holding the door knob

    • By avatarlauren1966 Jan 22, 2009

    • when i turned on (green)dell montior 2second went off(orange).

    • By avatarsofiabrant Nov 23, 2008

    • I have the same problem on acer AL1722 screen. The problem seems to be worst after I start the monitor and it is warming up. When the monitor has been on for a couple of hours the problem stops. Anyone able to help?

    • By avatargemugc Oct 23, 2008

    • The image was slightly distorted and then went off completley. now it just blinks on and off constantly.

      I have a Dell 19" lcd monitor

    • By avatarPrakash Naga Sep 16, 2008

    • I am having the same problem every 12 minutes my monitor switches off for 8 minutes.



      For saving switch off time, I am switching off the Monitor Power Line for 3 minutes. And the Monitor works normal after 3 minutes.



      Is there any one in Bangalore(India), to Repair / service this Monitor ?

    • By avatarGuest Sep 03, 2008

    • Exactly the monitor is on for two minutes and then off it goes.Then back on for a half minute then off again.

    • By avatarShay_847 Sep 02, 2008

    • I have the same problem, and it's not a problem with the power supply. If this many people have the same problem with the same monitor/model, then I would say its the monitor that is faulty. Aopen appears to agree with this since they have discontinued it without any support to consumers having this problem.

    • By avatarGuest Aug 17, 2008

    • I have the same problem, turn the power on and great picture for about 2 seconds then off it goes, turn off power and back on the same thing happens. If you leave the monitor on its got no pic for about 10 secs then comes on for 1 or 2 then off for another 10 secs, so on and so on, tried another monitor and thats okay, any help would be great....Andy

    • By avatarjbullock35 Jul 26, 2008

    • Similar problem: the monitor simply "goes black," i.e., stops displaying its image. It is still drawing power; for example, the green power light stays on. Turning the monitor off and then on again brings back my desktop -- but this happens frequently enough to be a pain.

    • By avatarhhyatt Jul 26, 2008

    • Fairly erratic and unpredictable outages. After a few hours, normally they will turn back on. I work with a dozen of these at work, and two of them have this exact problem.

    • By avatarGuest Jul 20, 2008

    • Same problem as Squanto's

    • By avatarGuest Jul 18, 2008

    • Please describe the specifics of your problem below. We'll add
      your post as a comment to Squanto's The monitor turns off and on repeatedly.

    • By avatarzjodell Jul 09, 2008

    • mine does the same thing has anyone figured it out yet?

    • By avatarGuest Jul 06, 2008

    • monitor goes off and on. is monitor no good?

    • By avatarcherrydezign Jul 01, 2008

    • Powers on fine. Stays on for a while then screen goes to black than after 2 or 3 seconds comes back on then repeates the cycle forever. Whats the story Jack?


    • By avatarverbeek Jun 30, 2008

    • Switching the computer the monitor sometimes comes on but mostly stays off.

    • By avatarGuest Jun 29, 2008

    • same problem

    • By avatarSusiAtlanta Jun 23, 2008

    • That's how it started here, too. I don't want to scare you, but eventually it stopped working altogether. :-( Anyone any ideas??
      :-)



    • By avatarwesmore May 21, 2008

    • I have a Polyview PT-725A. The display cycles on and off. Not even long enough for the screen to come on. Luckly I bought 2 of these and am usining only 1 a the current time. I swaped power supplies and the problem is resolves. Where would I get a power supply for this unit?

    • By avatarjdyck May 12, 2008

    • I just bought the Hannspree 22" Flat panel (HF229H) and am experiencing the same problem - every couple of minutes, the screen blacks out for ~3 seconds). I'm surprised that I can't find this product on Hannspree's support site. Any insight would be appreciated. Thanks

    • By avatarGuest May 07, 2008

    • It comes on and shows the picture but then turns off and comes back on and shows the picture and turns off again repeatedly. It seems to keep doing this forever

    • By avatarFastJimmyT Apr 21, 2008

    • Same trouble here, but I don't think the monitor really turns off the screen just goes blank then comes back on. Have found that this happens on any res setting above 1280x1024

    • By avatarnoelle0001 Apr 20, 2008

    • It comes on and shows the picture but then turns off and comes back on and shows the picture and turns off again repeatedly. It seems to keep doing this forever. It is getting power and is connected to the computer or it wouldn't show the picture.

    • By avatarHARLEYRELOAD Apr 12, 2008


    • I recently purchased one Acer X223W monitor. and it worked perfectly for about 2 months. One day a few weeks back it started having problems. When I turn it on the monitor displays the Acer logo, and then my desktop for about 4 seconds. Then it turns itself off. When I attempt to turn it back on it will show my desktop for a second or two and then turn itself back off. No matter what I try I cannot make the monitor stay on for more than a few seconds.
      I have tested the monitor on multiple computers with the same result. I can only assume this rules out my video card as the cause of the problem. If I place a different monitor in the same port it works fine.

      Do you have any suggestions as to how I can fix this? Can I send it in to be repaired (I have only had the monitor a few months.)

    • By avatarpyst20 Apr 05, 2008

    • i have a hp computer my monitor is a lcd



      i have windows xp

      raddeon 9550 card

      when i am using the computer it works for awhile then the monitor turns off and goes from green to yellow when i press it back to green it says no signal and the computer (cpu) is still on and running (as not been turned off) if any one has a idea about the prob send me a im pyst20 or e-mail at yahoo pyst20@yahoo.com thanks

    • By avatarrchristian Apr 04, 2008

    • Mine does the same thing. When I turn on the computer, the monitor turns off. I shut it off and turn it back on but it goes off again. The computer starts normally so I enter the log on password when I hear the little tune. Eventually it stays on and the screen says the NVIDIA grafics card stopped working.

    • By avatardtorq Mar 19, 2008

    • monitor turns off and on repeatedly but not in rhythm

    • By avatardms112 Mar 04, 2008

    • The monitor turns off and on repeatedly. After about 20 to 30 of this it finally does stay on and works fine.
      Mike

    • By avatarGuest Mar 03, 2008

    • I I followed through with one solution/given/ by another with the same problem: go to menu-bring up program the says "AUTO" press "OK" two

      times. Its worked so far for me...hope it works for your monitor. hopefully a solution for others.....Joe Wilson

    • By avatarhuizhang Mar 03, 2008

    • I had the same problem as monitor turns off and on repeatedly. I can see a burned area on the circuit board after I opened the back cover. I want fix it by myself. Is anyone who knows how get the A90F+ repair manual in order to get the parts list? Thanks!

    • By avatarrobstowell Mar 03, 2008

    • New viewsonic 21". particualrly (it seems, not seriously tested) after reboot, the monitor flicks on for about a second, then goes black. If I power it off, it comes back on for second- then goes black. You can (just!) get somethings going in this "mode" but it's quite hopeless for any real use.

      I thought it might be some sort of auto-turn-off setting- but I haven't had any joy with that. It's definitely not the gfx card or power- at least, other monitors don't have the same problem (and neither does this one most of the time, and when the gfx card dies the monitor indicates there's no signal- which it's not doing here).

      Seems to get better if left for a while. Seems a bit random in its attacks. I've thought that a reboot- and/or leaving the computer off for a few minutes- can fix it. But other times it's just happened for a while, and then seemingly fixed itself. I'd love a solution. (I have another of these monitors on another machine, and it's never given me a problem.) Otherwise, gotta send it back!

    • By avatarhuizhang Mar 02, 2008

    • I have the same problem.

      Hui



      huizhang78@hotmail.com

    • By avatarhollycp Feb 25, 2008

    • My monitor will turn off after it is not used for a time, if I turn the monitor off on the surge protector, it will generally come back on...sometimes it takes turning it off & on a couple of times.

    • By avatarGuest Feb 21, 2008

    • My roomie dumped his monitor for the same flick-on-and-off problem. I picked it up and have been using it with my notebook for about two months now without the problem. I think the trick is to push the Auto button twice, this Auto-configures the monitor.

    • By avatarGuest Feb 19, 2008

    • My SyncMaster 740BF is doing the same thing as others have described. Every few seconds the screen blacks out briefly then comes back on. I've checked and rechecked power supply--that's not the problem. Have only had this a year and have loved it up til this started happening a few weeks ago. Even when the screen is showing the image, there are randomly flashing black lines horizontally across the screen. Would love a solution--can someone please find an answer?

    • By avatarGuest Feb 16, 2008

    • Same problem here...except in morning restart computer and screen flashes on then off and stays off. Turn monitor off and on and flashes on shortly then off again. tried everything - nothing helps and is just getting worse.

    • By avatarGuest Jan 10, 2008

    • Monitor will not stay on. When power is initiated, briefly see a Xerox screen and then screen blackens. I have check the power connection and that is ok. I have hooked up to another PC and the problems remains the same on the monitor.

    • By avatarGuest Jan 09, 2008

    • check connections

    • By avatarcheve1981 Jan 02, 2008

    • work for 5-10 mins then rappedily the picture goes black then picture comes back for ever.

    • By avatarSkyrocker Dec 29, 2007

    • Phillps 190S6FB/27 Monitor. cycles on/off as follows: Power on, green LED power indicator on; 1-2 sec later, screen momentary flashes displaying normal view, then goes dark; Green LED off same time as screen flash; after 1-2 secs power comes back on, cycle repeats. I have manufacturer service manual, but it does not address this failure mode. I think Control board O.K. since I can turn it on/off. I think failure in the Power PCB or Scalar PCB. The question, how to determine which Printed Circuit Board failed? Strategy to determine which PCB failed, and replace board.

    • By avatarmurraymint Dec 24, 2007

    • Video keeps switching off and on repeatably even when cable is not connected to PC. Monitor is currently replaced with Hansol 19" 920D. System is working fine with this monitor.

    • By avatarbrucecurtis Dec 21, 2007

    • The monitor turns off and on repeatedly

    • By avatarGuest Dec 14, 2007

    • MY computer keeps on restarting. when I start PC it give option like start normallly, Command Mode, Last best configuration, Network Mode etc.

      when I accept any option it starts & suddenly blue screen with some text get displayed and goes off quickly withought getting a chance of reading those texts on the screen.

      I have two Hard Disk installed, O>S is XP Prof,

      RAM- 128 MB

      Hard Disk - 20+20=40 GB

      pls suggest what to do

    • By avatarDogDaz Dec 13, 2007

    • The monitor shows a pic for a few seconds and then goes black. The power button is still on.......really would love a solution as this monitor has a great pictures...well when it worked anyhow.



      Kelli

    • By avatarFreezerman Dec 06, 2007

    • I'm having the same problem with my monitor. This started to happen when it was first turned on - it would display the picture for about a second and then it would turn off for a second and then back on. Sometimes when the picture was on, the screen resolution would be different. After a 5 minute warm up time the monitor started working like it should. I then just never turned it off which was fine for about two months at which time it went back to the off and on mode and never came out of it. Maybe the power supply is going bad.

    • By avatarGuest Dec 01, 2007

    • I'm having the same problem, monitor goes black but the green power light stays on, it only stays on for 5-10 seconds before going black again. I'm annoyed because this monitor is only 13 months old. Its not the power supply, because my other monitor works perfectly on the same system.

    • By avatarGuest Nov 28, 2007

    • alow 5 minutes warm up for florecsent tube to light up

    • By avatarGuest Nov 27, 2007

    • Same issues, monitor "sleeps" at its own convenience. No predictable way to wake it up again. Headed for the trash I guess - 5 years since purchase.

    • By avatarppritchard Nov 20, 2007

    • In the morning, after the pc has hibernated overnight, the startup yields an image on the monitor, then to black. The image pops back on the again to black. Restarting the pc doesn't seem to effect it. But after a while the picture does stay on. Also, when the picture comes and goes it makes a sound almost like a door closing or a pop when the screen goes blank.

    • By avatarZer0cool Nov 17, 2007

    • My monitor turns on briefly, I can see the bue screen for a flash of a second and then it goes black. The green power button is lit indicating that it is still powered on. I ahve tried using my monitor on another system and the same problem occurs

    • By avataraskoryk Nov 13, 2007

    • It comes on and shows the picture but then turns off and comes back on and shows the picture and turns off again repeatedly. It seems to keep doing this forever. It is getting power and is connected to the computer or it wouldn't show the picture.

    • By avatarBoowasah Nov 08, 2007

    • monitor turns goes black after short periods of being on ....green light blinks for a time period the the orange light comes on.......on and off swich dummies up a little before working and I exhaust all known processes trying to make monitor work again if i pick monitor up wiggle it or sqeeze it some type of way it mayt turn back on only to go back off .......it appears to be in the on and off switch or links to it .....help me please thank you

    • By avatarGuest Nov 06, 2007

    • Hi:



      I have an HP-L1906 lcd monitor, the screen went out, but the power light stayed on. When I put it up on the bench to test, it would not turn on at all. I have it all opened up now, and will try to look for shorted transistors, chips and see if I can find something. Any tips on where to start. Thanks,



      Mike

    • By avatarmandyberlin Nov 04, 2007

    • My monitor turns on briefly, I can see the bue screen for a flash of a second and then it goes black. The green power button is lit indicating that it is still powered on. I ahve tried using my monitor on another system and the same problem occurs. My monitor is only three years old. Any suggestions?

Solutions (36)

Best Solution

I opened up and fixed a monitor just like this. The reason it only stays on for a second is because there are 4 or 5 bad capacitors on the power supply board that have over heated and gone bad due to cheap parts or poor ventilation. All I had to do was replace them and the monitor worked fine after that. Also i resoldered one joint on the bottom. While I dont reccomend the average home user to try this it is an extremely easy fix if you have the right tools.

    • By avatarKyle Porter Mar 03, 2008

    • This fix that i sugessted is only valid for an HP Vf15 or a compaq FP5315

I am an LCD repairer. The problem is power problem. If you remove the plastics from the back of LCD you will see two waffle boards. One is the power the other is the video. You will need to replaced the power (its yellow)

Oh my goodness! I was ready to chuck my other monitor out because of the on then off after a few seconds (faulty thing) - when I came across one of the posts earlier.

All I had to do was to push the "Auto" button twice and now it's back to normal.

Thanks to the guy who posted the solution. Thought I'd post it again here in case someone else is having the same problem.

Saves me buying another monitor! Whoohoo!

    • By avatarD Kerfai Oct 01, 2011

    • Thank you, wiseinvest! I found your post, pressed theAltGr button twice on my Acer laptop German keyboard, and the monitor stopped flashing. I am sharing this tip with my family and friends as well!

I have been working on lcds for about two years now and what I find alots of problems is power supply...caps are often number one problem. I have repaired about 500 lcds with just replacing
caps in power supply....hope this help cyborg

  • By Author imageTim Feb 10, 2008

Like many users here, i fix these things too. And while I agree that many screens have faulty boards inside, the highest degree that I find faulty are simply the screen ribbons not seating properly.
Why so many others only replace the complete board, i'm not sure, but that's just me being awkward ;-) I do seem to find the most weird problems around :)

The first thing is - why does AUTO-ADJUST affect a screen ? That's mainly because your PC is sending out a specific signal for screen resolution and frequency. All screens have a maximum resolution & frequency, and if you go past that level the screen switches off (or to standby) to protect itself.
Sometimes a screen will notice a bad setting instantly, and some may take a few seconds before they switch off. That's just normal.
If the AUTO doesn't fix yours, and you don't want to be soldering new components or replacing complete boards, then you can try as I do.....
Take the rear panels off the screen (these can be very weird & complicated, held with screws and/or tape, metal tags, plastic pins etc., and sliding fitiings), and eventually you will reach the actual white plastic panel at the rear of the TFT screen itself.
Usually at the top-centre of the screen (nearly) you will find a flat ribbon cable taped down to the back of the screen. Note that you should only attempt this is (1) you are good at this kind of thing, and (2) you have good dexterity with your hands - cos this isn't as easy as it may sound.....
remove that tape holding the ribbon. Do that very very carefully, the ribbon is fragile, and the connection it goes into is even more so. The ribbons just pull downwards - keep it flat until its out, and 'never' bend that cable. (the tape is best removed by keeping it flat/close to the back of the screen, and pulling towards the top of the screen slowely - DONT just pull it away from the screen, it'll damage the parts very easily.
If you have some, spray a bit of SERVICOL electrical cleaner on the ribbon & screen connection, then put the ribbon back in again - this is far more awkward than removing it - do it slow and carefully, never being rough with it, never forcing it to hard. The connection your pushing the ribbon into is very easily broken by pressure, so don't touch it or grip it.

Next put the tape back over the connection & gently rub it flat, I always replace the tape with stronger types of 'duct tape'. That's not essential though, although if the original tape seems not too sticky any longer, you should make the effort to replace it.
Rebuild the parts again, and see if you're as lucky as me :) I fix about 5 a week from my supplier, and any size from 14 to 22 inch screens usually gets sorted by this kind of repair.
Good Luck.

Hi this is the way how to examine what's wrong with your LCD monitors. Power on both CPU and monitor. After it turned off, you have to check if you can see the image on the screen or not by shining a flashlight into the screen, not directly but find the best angle to the screen and take a look very closely. If you can see the icons or any image, there will be a minor problem. Like me, I can see window image using flashlight and check lamps inside. Some of them were broken and it is easily replaced. If you cannot see anything on the screen, there'll be some problems with inverter board. If you have soldering tool and want to fix it by yourself, check the caps first. It may cause this problem. Some caps might show leaking or burn spot on the board because of too high temp. If you don't have soldering tool, you better go get a technician to do so.

i have a lg 1920p that does the same thing.finally got mad and took it apart and found that the plasma or whatever liquid was seeping out from the bottom of the screen which in turn shorted out the board that has all the control buttons on it. disconnected the board and it works fine minus the control buttons.

this is probobly a problem with the power supply. check computer with another monitor in prder to determine which unit causes the problem. lots of electonic devices got a high-voultage defence system, which shuts them off when they receive too much power. my guess is the mechanism in charge of adjusting power level to monitor got screwed up for some reason.

The lcd has three parts the screen plate(windows)/the logic(vga)/the inverter(power plug). Parts that go are the backlight ccfl's, behind the plate, and parts of the inverter, ie capacitors, all three take a bit of power from the inverter. The self test check that all the lights are ok and the inverter is ok, else it switchs off, ie if 3/4 light work it will switch off(my own case), hence the on chech error then off, However sometime there are stages of on/off ie on/ but no screen display, if that is the case the following may be of help...if you put bright light at an angle close to lcd can you see a windows shadow, text icons etc, ie still logic power passing,then .... (from a.n. other) after two weeks searching
I finally find doctor living stone http://www.aplusperfect.com/articles/lcd_capacitor_repair more fun with paulbtorrent, the takening the case bit off is like opening your wallet a second time after buying a new LCD, but you must! smallest two screw driver's flat headed, practice using two pennies stuck together()with your fingers after, one little () move and inch and {} again, with the case , it does
not break, just need to lever open [once open you realize they somehow put that old briefcase clip inside!] also note the bright light test to do first to see if can see a windows screen , and that capacitors are one for a number of things that a make a
inverter work! there a transistors as well, given that however, to replace all the capacitors on my inverter, was 11 capacitors, cost me $11 (uk ebay) and already had the iron and solder. So only cost me me $11 to try and see but no luck , still fun and I still can see the screen for 2 sec' at a time plus I have a spare set of caps now in the event that the new one do go burst! you have to laugh really, what next , a new on/off button, as you work though the whole inverter ! mmmMMMMmmmMMMMmmmMMMMTim Berners-leeMMMMMmmmmMMMMMmmmmcome back all is not
wellMMMMMMMMMMnnnnnnweek later land sight mmmmmMMMMMMMMMmmmmgggggggg(from another a.n other)Generally, if the screen went out quickly, it was the
inverter. If it went out over a slow period of time (flickering etc..) I
would bet it is the lamp.replaceing the lamp should be pretty challenging. as that requires complete breakdown of your LCD, extraction of your dead lamp, and soldering in your new lamp... but I would like to say that I it did this after realizing it's 2 x kitchen strips inside [========] with wires that can connect back to the inverter with out any desoldering(ie kit assembly/dis) with the outter case remove (glass plate safe away) I could reconnect and see that 3/4 were working (i!i hardcard ) cause the inverter to switch off after a secound ! order ccfl and replace and going
to cheap and see if I can get away with fitting a 15" in my 19' as it a 1/3 of the price ! the market as drop out there, hope the inverter does not miss the length, or the screen out put.
http://www.lcdparts.net/howto/troubleshooting/LaptopCCFL1.aspx OR MONITOR

LCD's often have problems with the inverters burning out. Using a bright light source, look at the monitor from different angles. If you can see the image in the screen, either your Florescent light is burned out or your inverters that run the lights are bad. Both are replaceable.

Why does everyone assume it's a hardware problem. I have no electrical knowledge or money to repair, buy new, or replace parts for my monitor. Give me more possible software solutions. I think this has something to do with "Auto-adjustment"
Because if I cycle my power button off for 5-10 seconds the monitor works perfectly, but if I cycle it quickly, only allowing it to stay off for 1-2 seconds, it says 'auto adjustment in progress' and turns itself off again.
Why is this? My computer screen stays black whenever I reset my computer unless I cycle it's power button, which annoys me because I just spent the last month tweaking my computer to boot up as quickly as possible, in about 15-20 seconds and all my system is using an old a7v600 1293 mhz motherboard/chipset which is like a decade or more old... so I was proud. Now I can't even see when my computer is restarted and I have to wait an extra 10 seconds to mess with my moniter, Totally wrecked all my work.
thanks.

we have a dell doing the same thing. changed monitors, still the same. when it first comes back after being black, the cpu monitor for usage is pegged. The explorer.exe is the process that is spiking.

It is almost certainly either the gas discharge tubes (flourescent backlights) for the screen, or the inverter (electonics) that powers the lights. Both of these components fail / wear with age, particularly in earlier screens.

Sony has seen this before. Model SDM-HS73. Here is there advise for this problem.
==============================================
The LCD turns itself off and on every few minutes or seconds.
function lno1() {}
lno1()
If the LCD takes several minutes to turn on, or turns itself off and on every few minutes or seconds, perform the following procedure to troubleshoot the issue:

  1. Ensure the power cord is connected to a known working outlet.
  2. Verify that the detachable interface cable is securely connected to both the computer and the display.
  3. If available, connect another display to the computer to confirm the computer is operating properly.
  4. Use a different interface cable to connect the display to the computer.
If the issue is still unresolved, service may be required. The Sony® eService Web site at http://eservice.sony.com/ can assist you in obtaining service from a Sony Service Center or locating a Sony Authorized Servicer.
=============================================
This did not resolve the problem with my monitor.

I had the same problem and found that my power supply got mixed up with another. I found a bigger power supply and it fixed the problem.

I agree with the other solution poster. My en-9110 is doing the same thing and the light on the power brick is cycling on/off with the display. Contact Envision for an RMA if the monitor is still under warranty, if not you can get a cheap power brick off ebay. I would buy an OEM type one though and not a universal one.

replace all capicitors ....also i noticed that my board had a bit of a burn beside the main capicitor just a little nothing to seriuos... 450v capistor forgot what the uf was...but anyway i checked that capicitor it lost 7% of its energy storage capability and normally when u replace capicitors is when u lose 5%....sooooo....hint anybody? i guess ill just do this...also before my monitor went bad (19" dell lcd flat screen) i did mess with resolutions with my computer and stuff i was just curious maybe my monitor just got stuck in an old cycle of changing its resolution and cant...i guess time will just tell

could this be simply "heat" not being able to circulate air thru the side slots of the outer case of the monitor?

Got the same issue will post once I Fix it ;)

I see the problem is some burned parts on the circuit board. If someone who can find the repair manual and replace these parts, the problem should be fixed.
huizhang78@hotmail.com

    • By avatarNYSalesman Jun 30, 2010

    • If you can identify the parts, most likely capacitors, or if you just want to repalce all the capacitors on the power pcb, then you can buy replacement capacitors at your nearest RadioShack. I know RadioShack gets a bad rep for cheap components but I would bet that you will get a supierior cap from RadioShack compared to what's already in your monitor. If you're not electrically inclined, then be very careful because the monitor (large capacitors) has high voltage even when it's uplugged. If you do decide to change the caps then look at the existing caps on the board that you want to change. They will be labeled with the uF (micro farrad) and voltage rating of the capacitor. You will want to get a new capacitor with the same uF number as the one you are replacing and a voltage rating the same (or higher) than the one your are replacing. CAUTION: Do not get a capacitor with a voltage rating that's lower than the one being replaced - this can lead to trouble and is also a fire hazard. This shouldn't be a problem as most capacitors in monitors today are rated for 120V and most RadioShack capacitors are rated for 240V. If you can't find a capacitor with the same uF as the one you're replacing, then you can hook multiple capacitors in parallel (legs of each are soldered to the same joint). Hooking up capacitors in parallel sums their uF capcacity.. For instance, assuming you want to replace a 22uF capacitor but RadioShack has only 10uF and 2uF capacitors. Then replace the 22uF capacitor with two 10uF capacitors and one 2uF (10uF 10uF 2uF = 22uF) hooked in parallel... hope this helps.

I Had The Same problem With my iiyama E481S. it Kept Switching off then switched its self back on if u left it long enough till the other week when it wouldnt switch on at all. After a few hours of checking insife i found there was a dry joint on power PCB. So Re-solderd its (was L101 on mine) and works fine again....

  • By Author imageMark568 Feb 08, 2008

check for some dry joints in the primary section of psu especially on the main filtering capacitor and on chopper transformer

I have a 19" HP f1905e LCD monitor. Twice recently, my PC failed to boot - it automatically tried rebooting (successfully) and told me my monitor was the problem.
Went to MSFT: there was an upgrade driver. Downloaded and installed it. Henceforth, the power saver kicked on every 2 seconds, regardless of key use or mouse movements. Finally caught it in a stable condition, and restored to a period prior to the upgraded driver (getting rid of it). Suddenly - all is well and working perfectly again!
Go figure.....

  • By Author imageRitaDC3 Nov 13, 2007

i have the same problem with MY monitor which just happens to be the 19" screen. ive also noticed that the green light on the power button keeps blinking. if i just disconnect the video input the monitor actualy stars on and shows the xerox screen and the proceeds to searh for an imput n then goes to sleep as usual. plug in the video in, and it power cycles. verified the cord and the source as normal so the problem is definately the monitor. the question is, wwhats the problem

yeah open it up and look around for bad caps or any other signs of problems hint hint im sure you will see

  • By Author imageGuest Aug 20, 2008

My En-7100si monitor doing the same thing...has turn off and on several times the monitor-at least 4x- to make it to work-after turnig the computer off for 1/2 an hour or from stanby mode. It works no problem after. I have't done anything yet rather than inspections of connectors. I'll dig it probably later after work.

  • By Author imageGuest Aug 17, 2008


Ignore solution #8. It is complete nonsense. 

  • By Author imageGuest Jun 18, 2008

I keep on getting the contrast bar and evertime I press exit it comes up again. Basically I cannot get ride of the contrast bar in the middle of the screen. It' slike the down button is being pressed all the time! Also if I stitch off the monitor it takes ages to put it on again. (bulullu@hotmail.com)

  • By Author imagebulullu Apr 05, 2008

another site I found on google said it was bad solder joints causing the problem. I have an aoc (envision) lm729 ,that is under warranty. so i got rma and sent it in. this monitor went from staying on and going off to just staying on for 10 seconds and going off untill you turned it off and back on, then you had another 10 seconds. if you google it ,a guy has a web page with pics on a diy repair. but use extreme caution when opening any monitor, high voltage is present, and mercury gas in lcd monitors. is best left to a service tech with monitor / television experience. safer to buy a new one, then end up in the emergency room or worse. and cheaper than the er. most stores now have an extended warranty option ,so all you have to do is carry it in for free replacement of one of equal value.

  • By Author imageGuest Dec 07, 2007

According to Samsung, the problem is that the monitor is going into and out of sleep mode. The recommend pressing a key on the keyboard and if that doesn't work, press the third button from the right in the bottom corner of the monitor, then press a key on the keyboard. Needless to say, none of that worked. It's not software because I've installed Samsung's drivers.

It must be the monitor. If I could just take it out of auto power save mode. My power scheme in Windows is to NOT power off the monitor when it's plugged in.

I've tried it on a computer that has SyncMaster 740 N attached and I've got the exact same problem.

Kill the auto power save mode and I'm sure it would work fine. But I don't know how to do that.

  • By Author imageGuest Nov 02, 2007

I'm having the same problem and I know it isn't any of the other's above. The computer is hooked to a KVM and there are 11 other machines using the exact same monitor (I'm typing on it now) without issue. More still, the monitor was working some 15 minutes ago and I can't figure out anything that's changed except the mouse started spontaniously working on a completly different computer. I'm thinking it's maybe a software problem.

  • By Author imageGuest Aug 30, 2007

I had to run Malwarebytes to remove 2 ad ware issues and my monitor then stopped turning off and on. Hope it helps !

There are 4 identical transistors in the backlight circuit of these monitors (C5707 or cross-reference to NTE2668, about $3 each) which are prone to failure. They can be replaced by anyone with basic electronics knowledge and soldering skills. Also if your monitor has failed to the point where it doesn't try to light the backlight at all, the failed transistor may have blown a pico-fuse in the power supply circuit. These are labelled on the board as "PF"

  • By Author imageGuest Feb 02, 2008

replace 1000 ufr capiciters

  • By Author imageGuest Oct 03, 2007

This didnt work for me. I unplugged the monitor power cable and put into another power outlet, but it still keeps on doing the same thing.

  • By Author imageGuest May 09, 2007

Hi, My l1lcd2 17 in. Flat Monitor has a problem.

The Blue on led comes on and then it goes to amber and the blue led comes back on and the screen shows the first page for just a moment and pops off. and contiues to repeat this on and off. This happens very fast.I tried other computers with no luck.

Please advise. Seapple@bellsouth .net
Thank you, Sheldon Apple Merritt isl. fl.

  • By Author imageGuest Feb 17, 2007

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