Question about AOC LM729 17" LCD Monitor

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Black Screen but has power.

I have a 7LSP monitor that has gone black after rebooting the system. The power light remains on but blinks every 5 seconds. During these 5 second intervals the screen is faintly visible (Very faintly). I opened it up, but did not see any distended capacitators, but not really sure what I am supposed to be looking for..
Not sure what to do, since I am very much a novice at repair.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 38 Answers

SOURCE: Monitor problem

You are experiencing an inverter board failure. You will need to replace or repair the inverter. The inverter drives the CCFL lamps that illuminate the screen if the lamps draw to much current or components on the board are overheating it will shut down the backlights. Some monitors have cold solder joints on the toroidal coils of the inverter that causes this problem, very typical with HP monitors, If you are handy with a solder iron you may try just re-soldering board and replacing push-pull transistors for a few more years of use. Provide make and model and I can be more specific about probable cause and solution.

Posted on Jan 18, 2008

JULIANFIX
  • 975 Answers

SOURCE: AOC LM729 17" LCD Monitor Screen goes black

YOU HAVE A DRY SOLDER PROBLEM, You have to open the monitor and check the solders in the PC BOARD , mainly where theres A SMALL transformer resolder it , and try again ,that should fix it . hope it helps

Posted on Apr 20, 2008

  • 33 Answers

SOURCE: aoc lm725 display off after few seconds

I've had a very similar issue on many Dell Monitors. Mine have been under warranty and they usually send me a new monitor, but I believe the issue lies with the power supply within the monitor.

Posted on Jul 10, 2008

bammbammfran
  • 159 Answers

SOURCE: AOC lm720 no screen plus blinking green light

Sorry to say, but it sounds like you power board is due for an overhaul.
It should be fixable since it does show signs of a little life left in it.
It would have to be taken apart. A visual may tell for sure.
Look for bulging capacitors (canister looking things) This a sign of a typical failure.
Of course, not all capacitors bulge when they go bad. That would make things too simple !!
ebaysbammbammfran

Posted on Oct 12, 2008

SOURCE: AOC LM725 LCD Monitor

try looking for bloated caps, check all diodes... see if its not shorted/leaking and finally check the power regulator ic if its not shorted! note: some capacitors and diodes are very tiny, you should use a lens with good amount of light...



if it does not help..... well, what the hell? try pouring some gas, then light it up! that should solve the problem, at least it turned on right? hehehehe!

Posted on Nov 12, 2009

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http://www.badcaps.net/forum/showthread.php?p=73310

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http://s807.photobucket.com/home/budm/allalbums
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