Question about BenQ FP737S-D 17" LCD Monitor

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Monitor doesnt work

I had this monitor for about 2 and a half years.It is a BenQ FP737S-D 17" LCD. Well when i turn the monitor on, nothing appears its all black but the green LED light is on. Just about an hour ago it was working perfectly. Thanks

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  • Andoru Oct 01, 2007

    @ SparkGap nope nothing all black.and yes the computer is giving off a signal because i can use my old monitor which is really old on the computer.

    @ Vishal51 Nope all black.

    Well i guess i have to get it check by a trained service engineer

  • vwrobb Nov 21, 2007

    my Benq same monitor is doing the same thing. Green light comes on but no screen. Totally black.??



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Replace 3A PF### fuse on main board. (reason for the # is because I have put the monitor together and cant remember the component number) I could see with a torch the initial display on power up. The PCB has white writing on it to display what component should be on the board. All PFs on the board have wire links on them but one. It looks Iike a black cylinder, 7mm long, and 3mm diammeter. The green writing on it was "bel MS 3A". I would have found this fuse earlier, but the writing was facing down on the board. This fuse powers the circuit to the back lights. Please check continuity of fuse before replacing back lights, as a 10 cent fuse is cheeper than backlights.
Fuses WILL blow for no reason. I have replaced it with a 5A for testing, and everything checked out OK. Also the monitor powered up and has been running fine.

Posted on Jan 22, 2008


I'm no expert but is sounds like the backlight to me.
If you shine a light as someone mentioned above you should be able to see the "BENQ" logo faintly at startup. Try a few angle and If you can see it then I suggest you do this...

There are 2 assemblys that contain 2 small light strips that need to be replaced on both the top and bottom of the display.

Take the monitor apart and remove the display assemby. Place the assembly face down on a soft surface like a towel. Now you have to remove the back of the assemby that contains the curcuit boards. Open the little panel on the top right and carefull disconnect the ribbon connector by lifting the little plastic tab and gently pulling the ribbon out. Then remove the silver tape on the left side to reveal the power connections, unplug both and remove the bacl of the assembly from the screen. Now, as you look at the back of the screen, on the left side there will be 2 sets of wires near the top and bottom. The wires are taped to the assembly with a little pieces of black cloth tape, romove the tape and you'll see two tiny phillips head screws with litte arrows pointing at them. Remove the screws and gently tug on the wire until the backlight assemly slips out of the display chassis a little, then gently grasp the backlight assembly and carefully pull it out of the monitor. Take those parts to an lcd repair shop and ask for replacements or get them to replace the actual bulbs in the assemby. Re-assemble it and you should be good to go.

Hope that's a help.

Posted on Dec 03, 2007

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Switch off your monitor. Take out the VGA cable. Switch on your monitor. Does it display any message like "no video signal" and then go blank? If yes, replug your VGA cable it should work. If it still does not work, your VGA port of PC/cable of monitor has gone bad. If no, get your monitor checked by a trained service engineer, you cannot do anything about it. Still, TRY PRESSING THE BRIGHTNESS/CONTRAST BUTTONS ON THE PANEL. IT MIGHT HAVE BECOME TOO DARK ACCIDENTLY (OR BY DESIGN :-) )

Posted on Oct 01, 2007

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Shine a torch at the monitor screen from various angles, if you can see an image on the LCD then it could be the backlight or the PSU at fault. Do check that the computer is still giving a signal.

Posted on Oct 01, 2007

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