Hi I have an FP71g screen that turns off when my pc is connected. My kids lcd screen does not cause this same problem.I didn't relise they have a 3 year warranty and took it apart so now i'm stuck trying to fix the problem. It sounds like a power supply problem but i can't see any sign of component damage. Does anyone have the power circuit diagram or any suggestions.
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Re: Benq screen shuts down when pc is plugged in
If it's a 71g and not 71g+ resolder transistors 2sc5707 on invertor board along with grey condensers and inverter transformer.This should solve the problem if it was display shutting off with power led remaining on.Otherwise check power section.
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The picture board on your monitor is bad, since the lines are causing visual display, it means the
board of your monitor has developed fault.
The best thing for you
do now is to take the monitor to a local repairer within your vicinity to help with the replacement of the picture board
because the fault is not something you can fix yourself. in other not to complicate issues.
my BenQ FP71G 17 in goes on after hundreds of times pushing on off switch and when it's on it does not go off, I have checked the on/off switch which is working oke and when the moniter is on the auto adjust message (brightness and contrast)pops up frequently and the screen adjusts itself.
elainenemeth, Hi, Tell me more! How old is this LCD monitor? Is it out of warranty? Did the "SHUT-DOWN-IMMEDIATE" problem occur without warning? Did the BenQ display a "perfect" image the day before? Did you actually count----1001, 1002----1010 and then it shut down, after pushing the monitor on button. Did you do the "flashlight" test? With monitor connected to a "known-good", fully booted pc with Win Desktop displayed, TURN ON the monitor! Did it display the desktop for 1-2-10 seconds ? What did you see or not see when you pointed the flashlight at different angles about 1-2" inches from the now dark (black) screen? Get back to me with your results. I will offer the best advice possible to you as a consumer/user of LCD/FPD monitor. I'm louie12fix on fixya or lmistyrel @ aol.com Bye for now.
Had the same problem recently with a Benq FP71G+. It was still under warranty so I called customer care and they sent someone who replaced the board inside that contained all the buttons. I saw that the board was very easy to remove. He just unplugged it, and plugged in the new one. And its a very small board so probably doesn't cost much in case your monitor's warranty period has expired.
I have had this problem twice once at my school and once with my BenQ FP71G Monitor. At my school the monitor ( HP ) just stopped working and smelt like burnt popcorn.(though is think this is due to some kids chucking a soccer(football) ball at it! With my BenQ it has the same problem though i nownthink it is because of the monitor has been on for excessive hours ( 3-4 ) and just shut down because of overheating. I will see in a couple of hours if it works !