About seven months ago I picked up a used LG Flatron L2000CP monitor with what appeared to be a standard failure mode. When plugged in, the blue light on the power button would flash repeatedly and a distinct clicking noise plagued the troubleshooter's ears. This, according to numerous online sources, is indicative of failed/burst capacitors in the back of the unit. Indeed, upon disassembly, five 25V / 1000uF capacitors were bulged and in need of replacement. Recently, I purchased a pack of caps on Amazon rated to these operating specs. Replacing all of the failed caps with good caps while minding the correct polarity, I reseated the power supply card and reassembled the unit. It worked... sort of. The blue light no longer flicked and the monitor no longer clicked, however, a new failure was evident: when powered on, the LG logo would flash for 1/2 a second, then the screen would go black for four seconds, all the while the power light was solid blue. After those four seconds, the screen would flash the display for another 1/2 second, and then go black indefinitely. I have tried to connect to the DVI port from my Chromebook using a DVI/HDMI adapter and, upon the second flash of the screen, the Chromebook background shows for 1/2 second before the screen goes black indefinitely. From these observations, I conclude that the display card/video processing unit is intact, while the power supply card is the only part of the unit that is defective.
My hypotheses are that:
Power supply/converter and digital card with video-out ports. It's suspected that the only failure is in the power supply/converter.
Just the power converter/supply. Those five black caps in a bundle were replaced with 25V/1000uF caps off of Amazon.
My hypotheses are that:
- The capacitors are not low-ESR (they were not stated to be so on Amazon) and somehow the capacitors don't operate correctly because of this, OR
- There's some other issue with the power supply card that I have yet to uncover.
Power supply/converter and digital card with video-out ports. It's suspected that the only failure is in the power supply/converter.Just the power converter/supply. Those five black caps in a bundle were replaced with 25V/1000uF caps off of Amazon.
