Question about BenQ T705 17" LCD Monitor
When the power button is pressed, the led power is off, white all over the screen and displaying nothing.
When it have this kind of error is a problem of the powerboard.
Anyway you must open it and look at the all capacitors and if are them inflated, if them are inflated must change them.
But can be a problem with inverters... control the transistors - MOSFET on the powerboard.
Posted on Apr 04, 2014
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Posted on Jan 02, 2017
SOURCE: Q7T4 monitor
I have the same trouble,with the Benq Q7t4 power, but can you tell me how I can get it apart, I have taken all the screws out but can't seem to dismantle it.
many thks colin
Posted on Jun 30, 2008
Had the compete dark screen problem. Green/amber power light was coming on and off as expected but no image would appear on the screen.
Found PF751 to be open.
Thnaks for the help people.
Posted on Oct 08, 2008
Possibly either the backlight lamp or its associated power supply has failed.
Power buttons (mostly LEDs) have constant availability of low voltage (for some other circuits too) otherwise they wouldn't 'wake up' on command from a computer as some do.
The blackout could also be due to a failed main power supply so the incoming video is no longer being processed.
Posted on Nov 01, 2008
SOURCE: my ben t705 moniteur.... problem
I DID REPAIR A MONITOR WITH THE SAME PROBLEM. IT TURNED OUT, THAT ONE OF THE TWO HIGH TENSION GENERATORS FOR THE 2 LIGHTTUBES WAS BURNED OUT. BY REPLACING THE POWER TRANSISTORS AND THE 3 AMP. FUSE ON THE MAINBOARD THE MONITOR IS RUNNING AGAIN VERY WELL.
Posted on Aug 25, 2009
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
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