Question about AOC LM729 17" LCD Monitor

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AOC LM725 Color Cycle

Im a novice in electronic repair. just researching here n there about what i need to fix. My AOC got power on/off cycle. Learning from few articles, and a book, I found s push/pull transistor (C5705) shorted and replaced it. I also replaced C945 and A733 transistors and /A431 IC. Now it did power up but only display Red Green Blue, White and Black color cycle continuously. Im suspecting an IC labeled SC68410Z KA23500506C, or something like that but can't find it from the shop I frequent. Any help out there?

-filmdock

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  • filmdock Jul 05, 2009

    Because the AOC LM725 I was trying to fix belongs to the studio I work for, I didn't bother to bring the video cable along because the original problem was power cycle. Now when I changed the push pull transistor (C5705) which I tested and found shorted and the precision shunt regulator IC (A431) the power came back but it just kept cycling through full-screen RGB, Black, White color display. I thought that maybe if I'll try connecting it to the cpu with the right video cable it might behave differently, so I did, and walla--it's working! I just have this OSD lock display whenever I press the menu but I've read from some articles that it could be disabled by turning off the LCD and pressing the Menu button while turning it back on again.

    I hope this helps someone else out there.

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AOC brand are disposable, now if your going repair its chips, its definitely work or not... i tell you this monitor is very deliquate to work normally.... buy a new one...

Posted on Jun 16, 2009

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Posted on Jan 02, 2017

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