Question about Westinghouse LCM-19v1 Monitor

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Initial problem was the same as described by many others (screen lit for a couple seconds, then black); I replaced the five capacitors suggested by other repair experts (1000mfd and 220 mfd) - with same results. Monitor displays full-screen, good quality picture for about two seconds, then goes black. Power on indicator (green led) remains lit. Cycling power switch repeats the cycle - perfect picture for a couple of seconds, then black screen with lit power indicator.

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In that case the problem is now with the inverters or the connections to the CCFL tubes. You need to test it again, and this time focus on the inverters and their connections.

Posted on Aug 07, 2010


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This could indicate some component overheating/damaged. I haven't worked on a monitor like yours, but on several occassions I noticed that the problem was caused by blown capacitors. This can usually be spotted if you inspect the capacitors on the logic board carefully. If they are bulging or you can see black goo "leaking" from them then they need replacing. Other than that, troubleshooting of other components on the logic board is far too complicated to describe here.
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I just fixed two of these by replacing electrolytic capacitors in the power supply (in one unit, just the 2x1500uF smoothing caps, in the other I also had to replace a couple of 470uF). Diagnosed solely on the basis of the caps having 'swollen' tops (indicating that the electrolyte has dried?). Make sure you use 105 deg capacitors of the correct voltage. Symptoms were exactly as you describe.

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