Question about Computer Monitors

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BenQ monitor Q7T4

Hi; i'm looking for ID of ic701, what is it and what replaces it.
PC Board shows it has been very hot above this IC which is mounted on the bottom.
Monitor comes on briefly then goes off - maybe 20 seconds on 1st try.
Just a couple of seconds next try.
Thanks

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  • Anonymous Jul 26, 2008

    Yes I have facing the same problem as you. check with a friend who has experience with LCD monitor told me that the power board is faulty and need to be replaced. I am trying to contact the agent on Monday.



    kat

  • knowman Nov 22, 2008

    THis sounds similar to my problem as well. After i turn on my computer and my monitor heats up, it looks like the H output fails and the video folds up into a vertical line, then expands back out, folds up and expands back out...again and again and again. Pretty soon there's no video and you can just hear a relay clicking and the on light goes on and off, on and off. etc...



    .I found that my AT video card fan in the PC froze up and the card overheateded big time.. I figured that this was to cause for the video on my m991 folding up but after I changed the video card out in the PC, the M991 exhibited the same symptoms! Hmmm. Maybe the bad video card caused some components on the video circuit board inthe M991 to go bad? Does anyone know where I can get a schematic for the M991 video card?



    My email is;



    knowman@sbcglobal.net

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The part your after is THIS

It sounds like it's possible this is causing the problem since it provides the 3.3v supply to the video/logic board and without that being stable it will not work.

If you send me an email I will send you a schematic that should help you.

mailto:saitek@tpg.com.au

Posted on Apr 29, 2008

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I have this same monitor with same problem and with burnt board under IC701. Did you find out the ID of IC701?

Posted on Nov 25, 2009

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Please help me, iwant to schematic acer aspirate 77s, send file to my email sonhaji_master_md@yahoo.co.id. thank's

Posted on Jul 03, 2009

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