Question about Proview PL926WBi 19" LCD Monitor

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Screen goes dark after a few seconds

Other posts indicate this is a common prob with this unit. I have replaced power board cap's c211 thru c217 and c12&13 .The only electrolitic's I haven't replaced are c201 (100uf/100v) and c22 which i have yet to determin the value of.
The problem remains I can now get it to stay on for 5 or 6 min. every now and then and the display is perfect but it goes dark then will only turn on for 4or 5 sec by looking close I can see that the display is still on but screen is dark.
Does anyone know where I can get a schematic this unit as it would aid trouble shooting greatly .
ALSO if you have any sugestions on how to correct this problem i would very much like to hear them thanks-gls1934

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  • Tribb Dec 23, 2008

    I have the same problem has one found out anything yet??

  • Vlace2005 Mar 27, 2009

    My monitor stays on for a good while at times and at other times it only stays on for a few secs.I can tell it is still on but it is black.I can turn it off and right back on and you can see it for a couple secs.then it goes black again.

  • jessejohn1 Apr 04, 2009

    I think that is the problem. I have a PL926Wbi, 19", 900W and it went partially dark, a bit pink warming up, started flickering, then 2 seconds and it goes black. Seems to be a bulb short out problem to me, proview support was not help, just wanted me to ship in and pay to fix it, wouldn't give me any ideas what it could be.


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I think you need new backlights, if it was the inverter or power supply (the same in this case), it would not come on for that long, even 4 or 5 seconds. This unit has four 2mm x 405mm ccfl bulbs (cold cathode fluorescent light) two on top and two on bottom which can act much like household fluorescent tubes, coming on only briefly or one bad one causing the others not to strike or to turn off with it. I haven't been able to find exact replacements yet but I have an email in to Proview parts. When I find a part number and price I will post it here. Also if there was a problem with your power supply board, especially capacators, you would most likely be able to see that.screen goes dark after a few seconds - 5b4a2c3.jpg

Posted on Feb 21, 2009

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This is a problem with the backlights i just replaced them with some backlights from a lcd tv that had broke. i had to modify the case a little but once its together you cant tell the difference. has been working for an hour so far.

Posted on May 10, 2009

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Sometime replacing capacitors MIGHT resolve these this problem.There an inverter I.C. chip "BIT3193G" which sometime goes bad. Also this unit is also known to have bad lamps. The lamps size is 2.6mm(D) x 414mm(L). If replacing capacitor didn't resolve the problem then you will need know electronics to fix the problem. I do repair on this board and offer my service on eBay.

Posted on Mar 21, 2009

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Capacitors are one part of the protection circuit there are transistors in the circuit that will may also need to be replaced they handle the switching for the lamps at high rates pushing high voltage by ac. if the unit is less than 10 years old the lamps are most likely not the problem.

Posted on Mar 21, 2009

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My sreen is dark on my dell E153FPc when i cut it on i can see but it goes dark after like 2 seconds is it the contrast

Not hte setting problem, but more likely to be problem in the power supply /inverter circuits due to bad caps, shorted transistors, cold solder joints.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed DELL monitors to get some ideas what to look for:
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:

Capacitors kit: he can make you a set of caps for you.

Replacement board:

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Screen comes on then goes dark , turn it back off and same thing comes on and then goes dark you can barley make out imagies on screen

Most monitors failures are caused by failed capacitors in the power supply/Inverter board, you need to open it up and inspect for caps with bulging top/seal, see example of failed monitors due to bad caps:
Post back what you find inside so we can guide you further.

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This type of failure is usually the backlight inverter power supply. We have an article posted on our site at: that explains what normally goes out and what needs to be replaced to do the repair. If you would like to post a few pictures of the boards in your unit to our forum section at: then our techs will contact you and guide you thru repairing the unit. If you don't want to do the repair yourself we do offer a repair service, that info can be found here:

I hope this helps, if so please rate our solution.

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Screens goes dark after 3 seconds

Your power supply probably has a blow electrolytic cap on it.

You need to pull the power supply board out and have someone replace the electrolytic caps on it. Believe me....if the one for the brightness is bad...they are all suspect!

Caps are cheap...but knowing how to open the monitor and do the soldering is the part that takes some skill and may be costly.

Good luck and be careful.

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Hello Joe,

A red or pink coloration on the screen indicates bad backlight bulbs. They are just like standard fluorescent bulbs just much smaller. When they start failing they light up with a pink color and that will make the screen look pink or red. You can change them but it may not be worth the trouble. You can do a Google search for compact fluorescent tubes and check prices.

I hope this helps, if so please rate our solution.

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Problem with monitor

Are you able to see a slight image on it at dusk and maybe with the help of a flashlight. since your blue light stays on the video board, may be okay.
It sounds like you have bad capacitors on your powerboard or possibly a burned out transistor on the inverter.

Only way to really tell is to open it up.
If you unplug the screen to video board ribbon, you may notice a different effect in the screen lighting.
There is a chance one of your bulbs is creating a problem
Should the screen happen to light up all white, then your power board and inverter are okay and the problem may be in the video board.
If it looks pinkish or dark or flickers then the bulbs or a bulb may be the issue.
If it flashes on then goes off, it's in the power or inverter board.


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Change out C202- 680 uF 25 Volt electrolytic capacitor. Replace with 25 volt or higher. Observe proper polarity when replacing cap: (-) goes to the side with the black mark, check old cap before removing it to see. I just fixed the same monitor today.

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