Question about BenQ FP791 17" LCD Monitor
I have a BenQ FP791 17 in LCD. I was working until one day I turned it on and it now only displays an all white screen. I plugged it in to another computer, same problem. I can add it as a second monitor to windows but all it displays is white. Windows finds it and the mouse can move over to it but I do not see anything. I am handy with a soldering iron, but not nessisarily diagnosing electronic problems. Any suggestions. My monitor screen is white
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Posted on Jan 02, 2017
SOURCE: 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.
Posted on Mar 24, 2008
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
SOURCE: Benq E2200HD No Cable Connected!
mnk1001, Possible Failure of internal "switch-mode-power-supply"/ "CCFL inverter supply" of E2200HD. Will need to investigate to see if SMPS is in emergency shutdown mode. Please post back if you find out root cause of failure. 12fixlouie
Posted on Apr 11, 2010
SOURCE: trying to purchase a power
On the screen itself, where it plugs in, it should give you a voltage rating, and a line with a C encompassing a circle. Make sure that these two things match up between the two screens, they should, but at the same time, there is the possibility that they don't. Also, make sure the plug is the right size. Yes, it should work, but I would just take the extra precautions listed above to prevent frying your monitor.
I hope this helps!
Posted on May 04, 2011
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