Question about Computer Monitors

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HPvs19e The pic link does not work. Can you send the pic plus the specs for the caps? Many thanks.. Ken

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  • Anonymous Jan 06, 2009

    monitor wont turn on

  • Anonymous Jan 19, 2009

    Cap Xon, 1000 uf 10V, KF 105 deg C, P602 vent
    (3) capacitors identified on the board as: C822, C823, C824



    note, i had same problem, ordered these capacitors on the web, total cost including shipping was $3.20, i installed them and now my monitor works perfectly. only one looked buldged on the top, but replaced all three anyway.

    could only find 1000uf 16v 105C hi temp, but a little higher number is ok from what i was told.

  • Scouse_01 Jan 20, 2009

    Can anyone tell me how to get the back of a HP Pavilion f1930, as I'm having the same problem and it may be the capacitors as you mentioned.

    Michael.

  • baytownbert Apr 21, 2010

    I cannot heat the solder up enough from the backside to release the capacitors. Am I doing something wrong?

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Ken:

Here is additional info requested, the hardest part is cracking open the monitor case. Prior to working on this you should check to be sure the capacitors are discharged. A good way to do this is to connect a 12V light bulb across the terminals and when it goes out the cap is dicharged. You can also have a look at this page ( http://ezinearticles.com/?The-Right-Way-To-Discharge-Capacitor-In-Switch-Mode-Power-Supplies&id=64778 )

Spec is:
Cap Xon, 1000 uf 10V, KF 105 deg C, P602 vent
(3) capacitors identified on the board as: C822, C823, C824
They are the 3 right above where the multi color wiring harness plugs into pwr supply board shown in lower right of pic.

John :).


HPvs19e - 3e49013.jpg

Posted on Nov 23, 2008

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I confirm that replacing the 3 capacitors mentioned with Radio Shack (1000uf 35V) worked perfectly for me in my HP vs19e. Thanks everyone for the guidance!
For others information, my board looked completely different, and I had to actually remove the board entirely to replace the capacitors.
David

Posted on Mar 20, 2010

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Hi that was great info,I replaced the same three 1000 uf 10V capacitors and the monitor works fine,all three imploded and bulged ant the top.

Posted on Dec 29, 2008

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TO FIX LM727; JUST FOLLOW THIS GUIDE
http://zorg.tripod.com
BY KELVIN M; REF ZORG.TRIPOD.COM

Posted on Nov 15, 2010

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2 Answers

I have a monitor about 2 years old. It keeps switching itself off, and must be turned back on at the switch on the monitor. Could it be that it's getting too hot? A simple answer would be...


It may have cold solde joints or dying power supply due to bad caps, very common problem.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
Please leave rating if it helps.

Feb 26, 2011 | BenQ G2420HD 24" LCD Monitor

1 Answer

Hi - I have two Philips 170b6 LCD monitors and both time out and turn off after 10 secs to 2mins? I can push power back on and they do the same again? Please help. thanks


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Sounds like some bad capacitors, probably on the power board. I've had similar problems with a Dell 17" monitor, a 42" plasma tv and a 37" LED LCD tv, all now fixed and working properly.

If it's under warranty then send it back to be fixed. If not then you have two options.

1. Pay a tv repairman or similar to fix it for you. Probably the most expensive option.

2. You could remove/replace them yourself if you're handy with electronics, or know someone who is. All you need is a soldering iron and a screwdriver. The capacitors themselves are quite cheap and easy to replace

They should look something like this:
drunknmonkey_4.jpg
As you should be able to see, the one on the left is bulging. The blue stripe with the arrow tells you that the lead on that side is the negative, the positive lead should also be longer than the negative one.

Tools needed
-----------------
1. Soldering iron.
2. Solder - not acid core
3. Phillips screwdriver
4. Flat head screwdriver
5. Wirecutters


Instructions
--------------
1. Unplug monitor and open case.

2. Identify power board, it should have a lot of electrolytic caps on there and obviously should be connected to where the power lead is attached.

3. Identify the bad caps, they should be bulging and/or leaking, although not always. Note down the three values for each cap (eg 220uf, 16v, 105c) and their approximate dimensions, and get new ones, preferably Rubicon or Panasonic, the link below will help you chose some good ones. If in doubt you could remove them and take them to the shop, but you'll have to remember where each one goes and which way round it was (take a pic).

4. Very carefully heat up the contacts on one side with the soldering iron, and rock the cap the other way, then do the other side, keep doing this until the cap comes out.

4. Replace with new cap, making sure that you observe the polarity and make sure it's securely seated and soldered in. Make sure the solder is neat, tidy and doesn't contact anything else. If there's any solder left in the holes then you'll have to heat it up or remove it before you can get the new cap's leads through. Once done properly trim the leads off so they won't cause any problems.

5. Replace casing and test. If it doesn't work then you'll have been a bit messy with the solder, tidy it up and try it again.

Here's some links to help you:

Bad caps faq - should have pretty much everything you need to know.
http://www.badcaps.net/forum/showthread.php?t=425

Jan 19, 2011 | Philips Business 170B 17" Flat Panel LCD...

3 Answers

Monitor does not come on. The power button lights up then goes off.Nothing on monitor


Primecoat is correct, it is the capacitors. Follow the instructions here for a simple and cheap way to get it back up and working like new:
http://boredprojects.blogspot.com/2009/09/hpvs19e-monitor-fix.html

Jun 28, 2010 | HP vs15 15"LCD Flat Panel Monitor

1 Answer

Lenovo ThinkVision L191 switches on then off again quickly. I've opened the back to look for bust capacitors but can't see any obvious problems - here's a couple of pics from different angles... Any...


The caps look OK. How is the 12~18VDC for the inverter circuits (you can measure it on the caps by the heat sink)? Does it stay at 12~18vdc or it drops down?
budmrtn@aol.com if you want to send me more pictues.

Jun 28, 2010 | Lenovo Thinkvision 19" LCD Monitor

1 Answer

My moniter wentr out.


Hmm, haven't had experience with this exact monitor, but several people have had success with my tutorial on fixing the vs19d and vs19e. Check out the link below:

http://boredprojects.blogspot.com/2009/09/hpvs19e-monitor-fix.html

Sep 28, 2009 | HP Pavilion F1903 19" Flat Panel LCD...

2 Answers

My HP vs19e flat panel monitor began taking longer and longer to come on and now it's hours. I'm afraid that one day it's not coming on at all. I have been leaving it on to keep from having to wait but...


Haven't run into this particular problem, but many have been able to fix their monitors that won't come on with my tutorial. See the link below:

http://boredprojects.blogspot.com/2009/09/hpvs19e-monitor-fix.html

Sep 25, 2009 | HP Pavilion F1903 19" Flat Panel LCD...

2 Answers

HP vs19e Computer turns on Monitor stays Black. blue light blinks


Same here- I understand that the capacitors are bad and need to be replaced. I am going to undertake it myself. Radio Shack sells them.

Apr 08, 2009 | HP vs19 19" LCD Monitor

1 Answer

My HPvs19e monitor does not turn on anymore.


mhellie1, Sounds like a typical power supply problem. One thing you and many hundreds of others fail to state is the AGE of their monitor, or calculate the number of hours (+ or - 20%) the unit has on it! It does help! Also, you didn' say if it was working PERFECTLY the day before, or that it failed when in-use. YES, These lcd/fpd monitors (all brands) are notorious for doing exactly what you have described. Here are some options that you as a consumer have. First will be awarranty claim with the manufacturer. If not, then ask if they have a monitor swapout program. You send them your's+$60-$90, and they send you a Refurbished same model, with new CCF tubes, INVERTER+Switch-Mode-Power-Supply installed. Or you can check your local TV/Monitor repair shop to see if they know forwards and backwards all about SMPS/INVERTER supplys and Cold-Cathode-Fluorescent Tube replacement. LCD monitors require BACKLIGHTING so you can see what is on the lcd panel. (screen) The technology is similar to the new style screw-in light bulbs. Compact-Fluorescents. Only your tubes are thinner and straight and hung horizontally in front of a mirror on the other side of the lcd/fpd you look at. Get back back to me if you want to try to repair this unit yourself. (not recommended for novices) Yes I have replaced capacitors and lucked out on a couple of them. I'm louie12fix on fixya or lmistyrel @aol.com BYE for now.

Apr 01, 2009 | HP vs19 19" LCD Monitor

7 Answers

VS19e problem


Most of the time the power capacitors on the power supply have gone bad. There are three of them in the power supply, 1000uf 12v on the left side of the dual transistor heat sink looking at it with the heat sink toward you. Go to Radio Sh and get three new ones(1000uf 12v min, as long as they fit 1500-2000uf 12-16v? does not matter) and solder them in. The hardest part is taking the front basil off the monitor. there are no screws, insert something strong and thin where the two half's come together and carefully start it apart. The LCD unit comes right out along with the power switch board. Remove the two screws at the bottom of the power board. The for back-light plug in's and the two screws from the main AC plug. The other plug in is a multi wire that unplugs from the other board. Replace the capacitors and reassemble. This goes wrong with this model all the time and is not as hard to do as you may think. What do you have to loose? Most likely save $150 bucks.

Jan 02, 2008 | HP Pavilion F1903 19" Flat Panel LCD...

2 Answers

Back light inverter caps


Hello,what is the numbers on the board you have and what revision is it? I have a non working monitor that powers up but has a bad raster board which displays vertical gray bands on the screen. power bd,inverter bd case, screen,and control bd are all in good cond.I may be able to get you a value on the caps or sell you the unit for spare parts. I am not going to repair this unit like I normally would most others.spuds619 psilva@gwi.net

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