The Westinghouse LCM 22w2 has bad capacitors on the yellow power supply
board. This is a common problem plaguing motherboards and LCD
flatpanels that use capacitors from Taiwan. If you know how to solder,
or know somebody that can, it's actually a pretty easy fix. Take out
the yellow circuit board on the inside, write down the specifications
for each of the capacitors (the cylindrical things) go to the
electronics supply store and get the replacement capacitors. You can go
over the voltage specification (not under), but keep the capacitance
value matching. Replace one at a time. Go to www.badcaps.net for
advice, tutorials and training on doing this. *You really should
replace all the capacitors*, but the very large one next to the power
plug I did leave on the board because I couldn't find a match. To my
delight, it was working as new!
I saved a ton of money fixing this, it's definitely worth learning how to solder to do this.
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Hope this helps.... Your monitor has an inverter issue. You know it's an inverter problem when:
1. Your monitor starts normally and displays the startup/desktop screen for a while.
2. Then it suddenly goes off, leaving a blank (black) screen or a very dim display.
• 1) TAKE OUT YOUR LAPTOP BATTERY • 2) REMOVE YOUR AC ADAPTOR CORD, that's the wall power, remove it. • 3) NOW HOLD DOWN THE POWER BUTTON FOR 30 SECONDS.
That will drain any static electricity that has built up on your laptop
system board and many times fixes the problem of a black screen. After
the 30 seconds re-connect your laptop to the wall power and hit the
power button normally and see if the laptop comes back up.
With a known working monitor try it on the computer. If the monitor stays on then you know the original monitor is bad. If the monitor goes off after 1 second again, then you know that the video card is bad.
If the screen is lighting up for a fraction of a second when you turn on & then goes dark, this indicates a fault either with the backlights on the screen or the inverter part of the monitor. You can check the backlights if you have access to a backlight tester, you need to remove the rear cover & connect the backlight cables into the tester, if this checks ok then look for a problem on the inverter board, checking the capacitors for any signs of distress.
I start my computer and turn it on, and everything looks fine for about 1/4 of a second and then it goes black while leaving the power light green. I can only see the screen again after turning it off and on, but that's only for another 1/4 second. What's up? I got my rosewill flatscreen as a hand me down from my father. I've had it for several years now. Was working fine until a month ago. When I turn the computer on the screen goes black after 1/4 of a saecond. I have to turn it off and on anywhere from 10 to 20 times before it stays on. I have checked all plugs to the computer and outlets. I have absolutely no idea whats causing this.
How old is the computer? Make sure that the power light comes onto the monitor when you plug it in, should be orange and then turn green when video card syncs with it when PC is turned on. If you are getting black screen when PC is powered on:
1. Bad video card
2. Bad video cable
3. Bad monitor
1Solution: Try using a different monitor attached to this same PC and see if it works. If it does, then its the monitor, its cable, or its power supply. If it doesn't work, then its the video card or the video cable coming from monitor.