Question about AOC LM-727 17" LCD Monitor

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Screen goes black - comes back with power off/on

Hi My problem is with the AOC TFT LM-727 17" monitor. Usually on bootup it displays the desktop then goes black/blank. No keyboard strokes or mouse clicks will retrieve the image. However, if I turn the monitor off and then on it comes back for a short time then goes balnk again. It does this about 4-5 times before staying on until I re-bott the next day. Sometimes is does it again during the day - usually after a period of inactivity. Is my monitor about to die? Thanks Russell

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  • Russell Bates May 02, 2006

    Thanks Techman and Windman
    I have tried your suggestions but the problem still continues. The good news is that I have contacted AOC and they agreed to swap my monitor. The bad news is they didn't turn up and so I will have to chase them up.
    Thanks for your assistance

  • Anonymous Sep 14, 2008

    i have the some problem.
    On my AOC LM727 the screen goes black after about a few seconds after booting. If i turn off the screen and on again, it comes back for a few seconds, and then goes black again.

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This site (one I knocked up for others) is the cure:

http://zorg.tripod.com/
Full details of how to fix for those with a decent affection for soldering

Posted on Mar 25, 2009

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I have the same problem, I've tried lowering the resolution and reinstalling the drivers but the screen still goes off, I can usually get it to stay on longer if I keep clicking the screen on and off.

I think the problem I have may be something to do with the graphics card or may still be a driver issue. The computer still has the same problem even with a different monitor... which confuses me even more.

I never alter the resolution or the voltage (power) settings so I doubt this is the root of my problems, I may just buy a new computer.

Posted on Jul 20, 2009

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The puter may have a bad driver so the moitor dosent work properly? To check this try booting up in safe mode. You do this on start up by pressing f8 over and over when you first turn on the puter. Then the puter will ask you what mode you wanna start in and you highlight safe mode. Once there go to monitor driver uninstall it and reinstall the driver (hope you kept the disc that came with the monitor.) If not your gonna have to go to the web site of AOC and dowmload a driver. Im saying this as I once had a puter monitor that the peeps thopught was bad and I hooked it up to a test jig and it worked all day. so when i did this to the puter it was fine. Now its astill a possibility that the back light curcuit is defective but maybe not??? Good Luck PS Safe mode in case you dont know is windows started with NO drivers installed and all the things like the monitor and mouse and keyboard are a windows standard driver and this mode is made so the user can change a driver just in case it gets corrupt or the wrong one is installed.

Posted on Apr 27, 2006

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It could be that the capacitors of the LCD monitor are dried out. There are 4 I think, you should change them, this is a very common problem with LCD monitors. Gabriel Cruz

Posted on Aug 21, 2007

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Hi there , have had 2 of these monitor and found that the caps in the power supply needed replacing , the parts are cheap but it does take a bit of time to replace them .

Posted on Aug 17, 2009

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Hi,
I have experienced this problem several times with my aoc LM-727 and each time it has been returned to aoc for repairs.
However this time it is out of guarantee so I have tried to do my own repairs.
First do try it on another pc just in case it is a video problem,(unlikely).Next shine a light onto the screen when powered up and looking from the side you should be able to see the normal screen activity although very dull.If you can,then the backlight is not funcioning and can either be the tubes or the inverter or power supply to the inverter.
To gain access remove the screen from the stand,(screws at rear).Next carefully remove the silver bezel that fits over the flat screen like a picture frame.Be extremely careful as it is delicate,I use a large blunt kitchen knife,after you get this off the rest is easy just remove the appropriate screws etc.You can now access all the above mentioned components for testing and replacement if necessary.Again be very careful especially if you need to remove the tubes they are delicate.There are two tubes one top one bottom and as it is unlikely for both to go,do test the power supply then inverter first paying particular attention to the large capacitors,as they tend to dry up etc.Spares are not that easy to find suggest you google and hope for the best.
Best of luck.

Posted on Feb 13, 2009

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I have exactly the same problem = the screen turns off after 12 seconds. Prior to this the screen has a lower brightness than normal. If I give the screen a "knock" or a push it sometimes helps and makes the screen stay on and with the full brightness, but then next time after booting up the problem is the same again.
This problem can not be fixed by any setup adjustments. The problem is some kind of a bad connection in the hardware inside the screen, likely some bad connector for the fluorescent tubes.
But how do you open this screen? There are no screws visible on the back or sides of the screen.

Posted on Jun 11, 2008

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Hi Maybe the manual and the monitor components don't match up as they should and its running "on the edge? First thing I'd be doing is double checking the monitor's refresh rates. try reducing the refresh rate It might be the connection cable. It doesn't like the mode used when starting up. This is usally 640x480 but could be different depending on configure settings or monitor cable detection Have you set up a mode for bootup? *Configure MoinitorType 4 *Configure Mode 28 *Configure Sync 0 or 1 good luck

Posted on Apr 27, 2006

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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

SOURCE: My AOC screen goes black after about a few seconds after booting.

Hello,

The picture board on your monitor is bad, since it goes off after few seconds and the power led or button is on, it means the picture board of your monitor has developed fault.

The best thing for you to do now is to take the monitor to a local repairer or service center within your vicinity to help with the replacement of the picture board because the fault is not something you can fix yourself, in order not to complicate issues.

Take care.

Posted on Jul 26, 2010

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