Question about BenQ FP731 - 17" LCD Monitor

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Benq FP731 17" monitor goes Blank after start up

Hi, As soon as I turm my Benq FP731 17" monitor, "Benq" appers for short time then it goes blank, Can any body help me on that. Thanks

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Re: Benq FP731 17" monitor goes Blank after start up

Change the 2SC5707 transistors and electrolytic caps in the inverter
section. Also check the 3A picofuse, and resolder all transformer

Posted on Nov 11, 2008

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Re: Benq FP731 17" monitor goes Blank after start up

The only solution I've been able to find for this is to turn off the computer for a minute or two and reboot, while rebooting, it is important to keep the mouse moving so the arrow on the screen moves. This should provide a temporary fix, I'm unsure about a permanent one.

Posted on Sep 03, 2007

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Have you checked monitor settings Carl? Some are set to sleep after a certain period of time. Mine was set to sleep after 1 hour (unknown to me) until I reset it. =)

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Logo appears then a blank screen

You need to open it up and inspect the PCB for bad solder connection or over heated components. BenQ made monitors for Dell, so look at some pictures of failed Dell monitors here to get some ideas what could have gone wrong with your monitors, post back what you see so we can guide you further:

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Do bios update on Computer.Select the product number and search on Website for bios and than try the monitor

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My monitor went black, and the power switch just flashes.

is your CPU working properly? if that the case, your monitor is in need of a service.
reasons for why a monitor goes blank?
Reason 1: Wetness
The number one reason why computer monitors go blank is - wetness. Believe it or not, when your computer monitor is exposed to humid air, sometimes water can condense and accumulate in the monitor. This causes the monitor to malfunction and go blank. I've had this happen to my desktop PC at least three times before. What you need to do is to leave the monitor alone for some time and allow the water to evaporate. That usually solves the problem.

Reason 2: Faulty Graphics Card
The next reason why your computer monitor goes black is due to a faulty graphics card. The best way to detect this kind of problem is to connect up a new monitor to your PC, then check if you have a blank screen. If you continue to have a blank screen, then it's likely your video card is faulty.

Reason 3: Faulty RAM
This one is less obvious and less common, but it can happen. You might sometimes get bad RAM modules which prevent your PC from booting up even to the basic BIOS startup screen. To detect this kind of problem is more troublesome, you might need to remove those RAM modules and insert them into another computer.

Reason 4: Loose Connections
Another reason why your monitor goes blank is due to loose connections. The connection from the monitor to the mains is usually a culprit, as is the connection between the monitor and the video card. Check those connections before you declare your computer monitor as faulty.

Reason 5: A Short Circuit In The Motherboard
And the final reason why your computer monitor goes blank? It's possibly because of a short circuit in the motherboard. This is the most undesirable outcome of course, as you might have to replace your entire motherboard. However, it's possible that this can happen - so keep your fingers crossed and hope it doesn't happen to you.
try this.
please rate my solution.
have a nice day.

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budged electrolytic capacitor nearby high voltage transformer. 220microcarad/25Volts. apply fresh solder and re-connect lamps.

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Monitor goes blank less than a second after turning on.

the moniter may be having  some technical errors   maybe the IC's has got corrupt 

you need to call the seller of the moniter

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Benq 17"Lcd monitor fault

Resolder the power transistors on inverter board and also check them.If display is not there at all some of this 4 transistors C5707 should be defective.Check associated fuse and Fet which drives the transistor.

Also check with Benq ,Normally offers three year warranty.


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Screen displays fine for a second, then goes blank

Dor, BenQ has a 3yr warranty on their monitors. I would contact their tech support and receive an RMA to return it for repair. It will cost you shipping out there but they will ship it back. I has a BenQ FP731 myself and it blew a capacitor inside that allowed the screen to stay on. Fixed it and had it back in 5-7 days. Good luck.

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'The Monitor goes blank when the box is powered' what does that mean exactly? what box? What was the monitor doing before the said box was pwered?

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