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Viewsonic VX2835wm monitor that powers up with a good screen for a couple of seconds and then goes blank. I replaced the power board and it still does the same thing. Could it be the on/off switch?

Posted by John Skerencak on

  • Larry Ng
    Larry Ng Mar 02, 2022

    Hi John Skerencak, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?
    gee all do that new. with dead PC
    your posts is not clear at all.
    2008 mfg date. means bad CCFL on most.

    all monitors even back to year 2000
    all go to dead black screen power saver mode if the PC is dead
    no video input it goes OFF LINE
    all do that.
    the OSD button works for 15 seconds at power ON then goes dead that menu button.
    lacking good PC or video generators like I have on my bench.
    by law ENERGY STAR.
    is he power lamp dead, not told.
    if dead Power LED, can be sold green or go yellow to signify sleep mode.
    dead power lamp is sign of dead power.
    100% dead,
    PSU or power pack as the case may be.

    lets see.
    turn monitor on, (power LED must glow)
    the screen shows a huge Viewsonic spash screen, (proving screen LCD is not dead)
    then goes to sleep, with dead PC.
    all do that every one.
    turn off then turn on and under 15 seconds push MENU key on mon.
    see OSD works. or is locked see unlock in manual.

    dead 100% all the time full time dead means
    CCFL dead 99% cause, super common
    this is not a LED back lamp monitor
    it is CCFL tube and most died in 5 years of life, 10hrs day used.
    the flash light test proves that.
    done right.

    1: point flash liGHT TO SCREEN.(FL ON)


1 Answer

Larry Ng

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  • ViewSonic Master
  • 13,313 Answers

gee that is normal on all monitors and by Energy Star laws too.
the monitor if the PC is dead or in speed mode, shuts of in 15 to 90 seconds, all do, every one. the monitor has self sleep, all do. everyone ever made did. even back to CRT days.

and the OSD button goes dead after. that. too. fooling the untrained.
here is the first tests, NO PC connected at all
power on see power light glow correct color
then see Viewsonic splash screen push the menu button now. quickly, if button dead hold it for 10 to 15 second to reverse the button lock now, see OSD works.

if you test the monitor on a good PC not in sleep mode the but working PC, your monitor is ok.

this monitor is very very old, 2004?
it has CCFL back lamps not LED<
and all fully used CCFL lamps are now no good, used 8yrs a day at 5years are no good. that is why we use LED back lamps now.
this is what they do: all do , used fully.
1: goEs dead forever, (vast did)
3: DIM BULBS (like me. lol)


Posted on Apr 04, 2020

5 Related Answers


  • 3 Answers

SOURCE: Monitor displays breifly then goes to blank screen

Well my Acer AL1711 finally gave up in as much as the screen flashed briefly at switch-on then went blank, regardless of brilliance setting so I decided to take it apart and try to fix it. The good news is that IT WAS NOT THE LAMPS that I feared in my earlier post and was easier than I had ever dreamed! First allow a good period of time for the internal components to discharge before starting. Remove the plastic clip at the base hinge to expose 4 screws - remove all four to release the stand. Then remove the 4 black cross head screws that appear to hold the back on, they do but there is more to do. Carefully tease the silver surround away from the case, best to start in the centre of each side and finish at the corners. There are many plastic clips to release before the surround comes away. Now remove the four cross head screws holding the pushbutton switch circuit board. The whole assembly can now be removed from the case and reveal a metal cover held by 2 SHORT (remember that!) SHORT! threaded machine screws. These once removed will allow the case to be slid away from the holding tabs located down the edges of the cover and removed. Now unplug the connectors from the board that has the mains input connector attached to it. You will see a heatsink with 4 electrolytic caps above it. Silly ACER designers, have placed the capacitors so that they get all the heat from the heatsink! Yes folks, the capacitors are above the heatsink when the monitor is in its normal operating position! So all the convected heat dries them out, nice. So the fault is due to a silly design error! Replace all 4 capacitors, two of them are 1000uF at 16V and the other two are 470uF at 16V, all radial types. Try and get capacitors with the highest operating temperature, at least 105 degree types and remember these are polarised, make sure you connect the capacitor + wire to + on the circuit board. You should have no problems with re-assembly but don't put the wrong screw where the short ones went or you are liable to see it come out of the screen LOL! Most important - - Don't forget the screw holding the earth tag to chassis. Good Luck, you will be amazed how much brighter the screen is now!

Posted on Mar 16, 2007


  • 1 Answer

SOURCE: vx900 viewsonic monitor problem . Blank screen except for power off/on

no, Viewsonic has the part for sale 42.99 - free shipping. Easy to replace

Posted on Jul 13, 2007


  • 579 Answers

SOURCE: Monitor displays breifly then goes to blank screen

The green power light indicates that the monitor is receiving from the computer correctly. I suspect it is going into high voltage shutdown. There is a safety circuit that monitors the high voltage and shuts the monitor down if it sees anything amiss. So the monitor comes on and then shuts off. High voltage problems are generally not worth trying to repair. Another example of a worthless safety feature. High voltage failures are not dangerous, and adding the safety circuit just kills the unit when it may have some life left or worse, sometimes it is the shutdown circuit itself which fails!
Hope this helps.

Posted on Jan 10, 2008


  • 20 Answers

SOURCE: NEC 19'' LCD monitor power on but screen blank

If you can try it on another unit , If it still does not work, Then the most likely culprit is a bad power supply. If you know any thing about soldering replace the capacitors they are probably bad but being that these things are being built so cheap.It could also have a bad inverter. not repairable by average dude.If you open it be careful and do not attempt unless you feel comfortable with a solder Iron.Hope this can help you Good Luck. board re builders.

Posted on Feb 29, 2008


  • 5158 Answers

SOURCE: screen goes bank after 2 seconds even if powder light is on

i just finished repairing a 20 inch acer monitor that had the same issue.... you have to take it apart and examine the power supply side of the monitor. there are capacitors that go bad on that board. you can tell be feeling the tops of them... the feel rounded. replace the capacitors and put it back together and it will work fine

Posted on Apr 16, 2009

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The Acer p191w uses the same power supply as the Viewsonic VX1962wm that your problem is a well known issues with that power supply. The filter capacitors go out and that causes the power supply to shut down within a few seconds. The monitor is easy to repair, you will just need to replace the bad capacitors on the power supply board. Here is a link to a repair guide for the Viewsonic VX1962wm and the information will be the same since the boards are the same in both units.

Viewsonic vx2835wm monitor, in DVI mode connection, altough getting signal from the PC(Other monitor connected and tested for graphic card problem-No graphics card problem!!) , Prompts "No input-signal"...

You will need to change the resolution of the screen on the computer to 800-600 and the bit to 24bits or 16bits, to do this right click on the windows screen, and click properties, goto settings.
You should see a slider at the bottem left of the screen to adjust the resolution, and a drop down bar on the other side for the bit rate. This should solve the problem, also you could open the scond screen also in the display properties, and drag what you need to see on the screen to that screen, you will know what i mean when you open screen 2 it just expands the desktop. hope this helps.

Viewsonic VX2835wm won't turn on. Did the usual troubleshooting but to no avail. I have two others that work just fine. Any suggestions? Thanks!

There are 2 boards/parts involved with this problem

a) The power supply board:

The main problem are 4 bad/defective capacitors
1. 22uf 400v
2. 47uf 50v
3. 1uf 100v
4. 22uf 35v

You can find them near the PWM IC controller (U601). Replaced all these capacitors regardless they look good. I pulled them out off the board and tested them with my Blue ESR and capacitor tester and found 3 were defective.

Next, you need at least 97% Isoprophyl alcohol and toothbrush to clean the soldering paste. Due to overheating on the primary section / HOT section the soldering leads tend to produce brownish paste which is causing the component parts to SHORT. Concentrate at the back of the board, especially at the U102 (16-pin IC) and Q202 transistor by scrubbing them carefully. I used magnifier to make sure the legs are clean and shiny. Clean the rest of the back and some part on top of the board. Let it dry for 2 hours at least. I did 2 times this cleaning to complete the process.

b) The Main Board

The main board has 2 bad capacitors at C124 and C126. I replaced them and cleaned also the board with alcohol.

That's it. Good Luck.

Roan Mac
Computer Tech
Chapel Hill, NC

Viewsonic VG2021m Image Vanishes on Start Up


It is the picture picture board on your monitor that is malfunctioning, since the power led or button is on, but the display screen goes blank after a few seconds, it means the picture board of your monitor has developed fault.

The best thing for you to do now is to take the monitor to a local repairer within your vicinity or any service center to help with the replacement of the picture board because the fault is not something you can fix yourself, in order not to complicate issues.

Take care.

I have a viewsonic VX2835wm and when i turn it on the screen turns on for a second and then goes black. How do i re-set the monitor?

In this model the capactors hardly ever dome or vent. Usually you will see the top of the labeling on the capacitor has shrunk a little from it's normal size. If the monitor still has any kind of power (which it does from your comment) you or someone you know can replace those capacitors on the output side of the supply. If you're lucky this will solve your problem. If not, you can always try replacing the four brown electrolytic capacitors on the inverter board (the long board on the left when viewing the monitor from the back). There is a chance this could be caused by the inverter board or even a bad backlight, however I would bet it's the power board. If you don't want to replace the capacitors or replacing them didn't solve the problem, contact Viewsonic at and get the price of a new power board. They are pretty easy to replace.

Viewsonic VA721 - Screen goes blank for second or two and returns

Sounds like its going to sllep too soon make sure you do not have it set in your video card settings. also try it on a diffrent computer. if that does not shore it up replace the acpi board

Btw, I’m available to help over the phone in case u need at


Screen goes blank within 1 second of being turned on

Bad capcitor in the psu would cause this to squel and even pop so have it looked at you be glad you did.

Btw, I’m available to help over the phone in case u need at


Blank screen with intermittent operation

you have bad capacitors in the power board inside the monitor replace these and the monitor will work fine

Vx900 viewsonic monitor problem . Blank screen except for power off/on

no, Viewsonic has the part for sale 42.99 - free shipping. Easy to replace
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