Question about BenQ T705 17" LCD Monitor

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Lcd benq t705 power button not working

When the power button is pressed, the led power is off, white all over the screen and displaying nothing.

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  • 165 Answers

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.

Good luck!

Posted on Apr 04, 2014

6 Suggested Answers

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Posted on Jan 02, 2017

  • 1 Answer

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

  • 1 Answer

SOURCE: BenQ FP731 17" LCD Monitor Problem

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

freetek
  • 5568 Answers

SOURCE: BenQ FP91G+ 19" LCD Monitor black screen

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

  • 5 Answers

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

  • 732 Answers

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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1 Answer

BenQ LCD Monitor FP567, no display.The Green Led flicker,but no image.Please send us some tips


dreaded inverter board problem..here is a tip on where to look inside your lcd as is similar models...http://www.electronicrepairguide.com/benq-t705-lcd-monitor-repair.html

Mar 03, 2009 | Computers & Internet

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Ilo tv


Plasma, ha, ha. It is a normal high tension generator who is burned out. Plasma is something very different, f.i. a special gas, under high pressure between 2 very thick glasplates. Such a screen weight kilo's! The T705 is a normal LCD screen with 2 backlights each with his own generator.

Aug 03, 2008 | BenQ T705 17" LCD Monitor

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Can't find video signal


If screen says "Signal cable not connected " all the time till power led switches to Amber chances are monitor is ok and problem is with graphic card or cpu.Connect to Known working CPU and confirm that monitor is the problem.
If same problem persists on another working cpu after changing signal cable,the interface board in the monitor could be defective.
Samir

PLease rate solution and provide feedback.

Jun 09, 2008 | BenQ FP731 17" LCD Monitor

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Dark disp-lay


sorry mate,that is dreaded power interter board inside lcd,read about similar benq model dramas here http://www.electronicrepairguide.com/benq-t705-lcd-monitor-repair.html

Jun 03, 2008 | BenQ T705 17" LCD Monitor

1 Answer

Philips 170S4 white screen not display.


its in the power suppy section,most of the lcd monitor has this problem,try to check the capacitor electrolytic or replace all th 16v capacitor

Apr 03, 2008 | Gateway FPD2275W LCD Monitor

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Benq LCD monitor


I had same problem. No Power at the monitor. what can I do?

Jan 03, 2008 | BenQ T705 17" LCD Monitor

1 Answer

Powers up temporaly displays goes dark


Your monitor has a bad back light. Send it back to your friend

Nov 22, 2007 | BenQ T705 17" LCD Monitor

6 Answers

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.

Nov 22, 2007 | BenQ T705 17" LCD Monitor

1 Answer

Blank scren, led stays green for only one second


Explicit enough to see that's this a a repair shop job. That also probably means a replacement- cost of which will not be much more than repair prices. One thing how ever- the power supply[which would appear to be the problem] is this built into the screen [that is does the screen have mains power direct? Or is it powered from an external 'Power Brick' If it is of the Power Brick type - then a new power supply is the answer - get on of the stabilized universal type with a fistful of connectors and a voltage selector switch.

May 24, 2007 | BenQ FP737S-D 17" LCD Monitor

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