Question about BenQ FP731 17" LCD Monitor

10 Answers

BenQ FP731 Screen briefly displays then turns off

We have a computer we brought back from a satellite office that has been in use for about 5 months. The LCD 17" monitor (BenQ FP731) and the computer have been plugged into a APC 500VA UPS for the entire duration. Prior to this move, they have worked just fine, together. When I plugged the PC in and turned it on here at the main office, the green monitor light comes on, briefly shows the POST screen then shuts off. If I turn the monitor off and back on, I can see the Windows XP logon screen briefly before the monitor shuts off again. I can power off and turn it back on and the screen displays briefly (about 1 second) then shuts off. I have tried this monitor on other PC's and it does the same thing. I'm at a loss at this point. It's not that old and has worked flawlessly until this point. Any thoughts on what else I can try? The video card works great with other CRT's we have (I haven't dared pull a working LCD off one of the other PC's as they'll come at me with knives :)

Posted by on

  • 6 more comments 
  • Bill Artemik
    Bill Artemik Jan 05, 2007

    You are the only one to reply to my problem. :(
    As soon as I find out, I'll post a solution, if nobody else here can contribute.

  • Bill Artemik
    Bill Artemik Mar 31, 2007

    I turned on the monitor and connected it to a PC. When I shine a flashlight on the face of the monitor there is nothing, leading me to believe this is a power supply issue as you suggest. Do you know of any sources I can check to purchase a replacement for this? The monitor is just barely a year old and what does appear for that 1/2 second is crisp and sharp, leading me to believe it's worth saving.

  • Bill Artemik
    Bill Artemik Apr 18, 2007

    I contacted BenQ about this issue. They have the same conclusing. The problem appears to be an inverter/power supply issue. It also appears the the monitor is under a 3 year warranty and they will repair :)

    THanks for your help with this! You were right on the money.

    Now if there was only a place for these parts...

  • Murpy Nov 07, 2007

    I have the identical problem with my FP731 monitor. Is this fix a costly thing to do? Might be better off to buy a new monitor if it's too expensive parts and labor wise.

  • Anonymous Dec 23, 2007

    I have the exact same problem. My monitor is about 3 years old. I need to find out if i am still in warranty.

  • manig Dec 23, 2007

    Hi,



    My BenQ T705 monitor went blank and took my computer to the repair shop and it worked fine with the other monitor. Is there an easy fix? When I turn the monitor on, I see BenQ briefly and disappears.



    I would appreciate any sort of help related to this problem.



    Thanks,



    Mani

  • jwang Dec 29, 2007

    I had the same problem and am trying to fix it with the solutions posted here. I found one of C5707 was shorted out. Anyway, I replaced all 4 C5707s and the FP751. But i didn't fix the problem. Any other suggestions? Please help!

    Jin

  • Anonymous Feb 03, 2009

    Mine does exactly the same. Comes on for only a second and goes off again. Tried on my other computer - does the same there. I am just out of my guarantee.

×

Ad

10 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Did an independent diagnosis before finding this, and came to same conclusion. First found fuse PF751 was open circuit (3A black plastic fuse, not glass) over close to main heat sinks. When I replaced that with a fine fine strand of wire (for testing) then I saw Q759 (C5707) get hot. Checking the others shows that they should be driving into about 420 ohms on the primary side of the transformer for the flourescent lights (backlights) but on this one it was less than 1ohm. I've unsoldered the Q759 and now I measure 420ohms here too. Now I need to find a new C5707 or equivalent...

Posted on May 17, 2008

Ad

I had the same problem with a benq fp731 (same board as the 737), replaced the 4 c5707's (little black 3 legged transistors, they look like upright FET's, next to the little beige colored box shaped caps) and it fixed it.

Posted on Dec 16, 2007

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Hi. i had the same problem and fixed it. the problem are the 4 transistors (C5707) one of more are shorted (Q739,Q740 and Q759, Q760). Also the fuse PF751 (3a) has to be replaced in most cases. In my case i replaced the fuse and 1 transistor (C5707)

Posted on Oct 14, 2007

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Dear friends,Thenks a lot.Your forum help me for ripear my monitor. you are the great! Thenks! Kiro.biro

Posted on May 01, 2011

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

Hello, the same thing happened to me, my problem seems to be one of the 4 transistors c5707 (in some cases could be more if not all of them), and the 3 amp fuse, now where can you get this parts from? I dunno if my lcd is under warranty, it was a "u-fix-it--it's-yours" gift.

Posted on Sep 11, 2009

Backilight fix it

Posted on Mar 11, 2008

Backilight fix it

Posted on Mar 11, 2008

Backilight fix it

Posted on Mar 11, 2008

It is probably the backlight inverter that has gone bad, it drives the CCFL lighting for the lcd screen. This model has a Inverter/powersupply combinatin board and are extremely hard to find replacements for.

Posted on Mar 31, 2007

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Hi to all,
You can get 2SC5707 on e-bay
Best regards
Maks

Posted on Jan 29, 2010

  • maks13 Jan 29, 2010

    Hi,
    You can get transistors 2SC5707 on e-bay.
    Best regards
    Maks


×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Benq FP731 LCD not start up, only green power lamp


Opening it will not likely solve your problem. Have you tried another monitor on the computer to see if the problem may be with the computer itself?

Mar 04, 2009 | BenQ FP731 - 17" LCD Monitor

1 Answer

BenQ 17inc LCD Monitor


change c5707 transistors ...all 4 of them plus fuse

Feb 10, 2009 | BenQ FP731 - 17" LCD Monitor

2 Answers

BenQ Monitor ' Out Of Range '


check your resolution settings and change to 800><600 and try again.If it does not work at 1024><768 try loading monitor driver In display properties it should show BenQ FP731 instead of plug and play monitor.
Samir

Oct 29, 2008 | BenQ FP731 17" LCD Monitor

1 Answer

BENQ FP731


Just leave the monitor for a while about an hour and try connect and see, if not displaying than Try changing the display resolution from your laptop and see what happens.

Oct 16, 2008 | BenQ FP731 17" LCD Monitor

1 Answer

How to take apart a benq fp731 lcd monitor


You remove the 5 screws behind and using a plastic card inserted between the front and back plastic frames gently prise it open.
Careful!!! High voltages inside.

Feb 21, 2008 | BenQ FP731 17" LCD Monitor

1 Answer

Can repairs be made to BenQ FP731 17 inch Flat Screen.


The power and Inverter board has a problem.Check Inverter transistors and the related fuse.

Jan 30, 2008 | BenQ FP731 17" LCD Monitor

2 Answers

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
pins

Aug 09, 2007 | BenQ FP731 - 17" LCD Monitor

Not finding what you are looking for?
BenQ FP731 17" LCD Monitor Logo

5,548 people viewed this question

Ask a Question

Usually answered in minutes!

Top BenQ Computers & Internet Experts

JP Services
JP Services

Level 2 Expert

310 Answers

Tommmix

Level 1 Expert

6 Answers

Computer Links

Level 3 Expert

2386 Answers

Are you a BenQ Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...