Question about BenQ FP731 17" LCD Monitor
I just bought 2 non working 17" lcd's for $10. I've challenged myself to fix them. I took them apart and one main board has a number of blown caps, the other looks fine. The one with blown caps would not power up, the other powers up but no picture whatsoever from vga, hadn't tested the dvi yet.
I took the video input board from the non powering one and put it in the powering one. I now can see the BENQ at startup very dimmly, but only with the dvi input. My first thought, the backlight. So I tried the screen from the other monitor in the now working chassis (LG PHILLIPS 170E01 A5 screens in both, btw). Same deal, saw the BENQ faintly but still all black.
I plan to replace the caps on the blown board and I may need a second input, although I will test the other one now that I know you can see the BENQ from the dvi input like that.
Do you think it's likely, given what I've described, that both backlights are out? or is it more likely that there's a power supply problem on my main board, if so, can anyone suggest how to test my backlights on their own and/or how to repair the board if that's the issue. I think I may start by replacing all the caps on both boards... thoughts?
How old are the monitors?
Normally backlights last at least 30,000hrs of working.
Normally problems on Inverter board transistors near yellow inverter transformers.
Posted on Feb 27, 2008
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
Posted on Jan 02, 2017
Tips for a great answer:
May 21, 2011 | Pentair 2 hp Challenger Pump
Jun 22, 2009 | LG 47LC7DF 47 in. LCD HDTV
Nov 15, 2008 | BenQ DV3750 Television
Aug 28, 2008 | BenQ FP737S-D 17" LCD Monitor
Apr 16, 2008 | MPC Computers AOC 7F 17" CRT Monitor
Apr 15, 2008 | BenQ FP71G 17" LCD Monitor
Feb 24, 2008 | BenQ FP71G 17" LCD Monitor
Nov 22, 2007 | BenQ T705 17" LCD Monitor
May 06, 2007 | BenQ FP731 17" LCD Monitor
Dec 29, 2010 | BenQ FP731 17" LCD Monitor
285 people viewed this question
Usually answered in minutes!