Question about BenQ FP71G 17" LCD Monitor
Monitor: Benq FP71G LCD
The monitor appears physically fine but when i go to power it on, it turns on (the green light appears) but after half a second the monitor powers itself off. Nothing is ever displayed on the monitor no doubt because there is no time for it to appear.
Any ideas what is going on? All i've done is switch the power cable and VGA cable but still the same affect. I'm using Windows XP Pro SP2 and have tried the monitor on different PCs and have tried it unattached to a PC.
Benq fp71g no display what can i do
Posted on Jul 01, 2011
I solved the problem 4 times, with SC5707. It worked only two days. After 2 days I replaced SC5707 again and so 4 times. At least Isoldered most of all high voltage pins an it works now about 2 weeks! Thanks! SC5707 also!
Posted on Jan 23, 2009
I had the same problem and found that Q808, Q809 and Q805 had failed and which if left long enough can also cause PF801 to fail. I also replaced all of the electrolytic capacitors during the rebuild as it was only a few dollars to do so.
Although in my case Q815, Q816 and Q812 were fine I suspect that they may also fail in time.
Here are the parts which should be available at most electronic stores or online.
Q808 & Q809 - 2SC5707
Q805 - IRFU9024N
PF801 - 3 AMP PICO FUSE
Posted on Jan 22, 2009
Shorted transistors and bad solder joints.
Posted on Oct 22, 2008
This problem is caused by the computer changing display modes so often during boot-up. This causes the backlight inverter to rapidly switch on and off. This eventually causes one or more of the 2SC5707 transistors to short. Changing the shorted ones doesn't fixthe problem unless you prevent it from seeing all the mode changes during POST. Many BIOS setups have an option to hide most of this behaviour. That might be enough. Otherwise, a solution is to leave the monitor turned off until the desktop appears.
Posted on Mar 27, 2013
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Posted on Jan 02, 2017
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