Question about BenQ FP767 17" LCD Monitor

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My BenQ FP767 monitor power is on, but the screen is black. my pc is very good.

When I turn on the PC, the monitor power signal is on, but the screen is black, I don't know what to do with it. Please help

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  • Expert
  • 40 Answers

Open back cover of your monitor then adjust the screen control of the flyback to your desired brightness

Joel

Posted on Apr 22, 2013

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: BENQ FP731s Monitor Problem white blank screen

BenQ brand new high-voltage wire circle
BenQ LCD Controls circle / BenQ LCD accessories more high success rate, and easy maintenance, fault lower again!

Name : BenQ LCD
Name : LCD Controls circle
Model : specifications : 1J.26048.011

BenQ LCD accessories four small mouth lights of the high-pressure reverse pressure plate used for high temperature must Taiwan curbs are enameled wire system. With a small noise, power, brightness control in high-efficiency low-loss. Rapid cooling loop can be designed according to customer-specific products.
2 features the use of high-precision inverter line Rao, insulation and can be a long time. 3 to 1. Electricity use light line measurement of high-frequency currents. 2. Backlight voltage output of a sinusoidal waveform. 3. The backlight brightness and the same as the original high-pressure plate. 4. 1-2 4.1 filament output AC exchange through the export of Maintenance and Spec - CN5 link to the. 5 and storage temperature and Temperature temperature ranges : -5 -- 50 ℃ work humidity range : 10% -- 95% RH the backlight should be within the scope of the above, the following conditions can store 40,000 hours. Operating temperature : -10 -- 80 ℃ work Humidity : 20% -- 95 % RH

BenQ LCD maintenance information


1 : BenQ LCD can switch planes normal (no signal light yellow, green signal), Looking carefully at the screen whether there are changes, they generally do not carefully read the screen can not see a change, oh, look at carefully Matata. Change or switch to a normal plane, the main board intact, such a high-pressure situation on board is no work, no lights lit backlight.
2 : disassemble machines, starting with high-pressure plate (box 220V piece of the plate), a screwdriver button open, not lazy. Power board and put the Main Board are removed, this is a good Off Power Plate,
3 : Measurement C5707, FQU11P06 (Some of the machines are used FU9024), whether the damage (breakdown) If the damage (breakdown), he seemed to see the appearance .22/160V capacitance whether deformation, If deformation replace, if not capacitance deformation on regardless.
4 : damage to the replacement of the device, if the fear of electricity burned again, you can Controls circle together too, In order to save costs if you should not start for high-voltage wire circle -- testing, If the damage C5707 meeting on the need to replace the high-voltage wire coils (most of the damage to the C5707 is Controls 72.9% Circle aroused),
5 : measurement of high voltage power supply board whether short circuit, without short-circuiting I would be grateful if insurance (PF801) new ones (General C5707 damage, insurance will certainly damage), If you do not have insurance you connect with fine copper wire, this 3-A insurance. Please stop the PF801 power-measurement, measurement inaccurate.

Understand how maintenance of electronic maintenance steps friends

1 : BenQ LCD can switch planes normal (no signal light yellow, green signal), Looking carefully at the screen whether there are changes, they generally do not carefully read the screen can not see a change, oh, look at carefully Matata. Change or switch to a normal plane, the main board intact, such a high-pressure situation on board is no work, no lights lit backlight.
2 : disassemble machines, starting with high-pressure plate (box 220V piece of the plate), a screwdriver button open, not lazy. Power board and put the Main Board are removed, this is a good power to remove board.
3 : replacement C5707 4 (Q809, Q808, loops, Q815) four high-voltage wire coils (T001, T002, T003, T004). 2 FQU11P06 or FU9024 (Qingdao, Q805). PF801 Insurance (insurance for the three A).

Posted on Dec 27, 2007

  • 5 Answers

SOURCE: BenQ FP767 17" Problem: Monitor wont turn on

Check four 5707, two 9204, and one bel 3A slow blow fuse. Also re-solder all cap and transformer.It's quiet common on benq and Dell(benq OEM) 17 LCD. For detail google "benq 5707", sure you can found. Good luck

Posted on Jul 19, 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

  • 732 Answers

SOURCE: Monitor turns black after 3 seconds

teo6925, "Switch-mode-power-supply" is in partial shutdown mode. Can you see any electrolytic filter capacitors that have a slight "swelling" to their tops? They should be flat!! You may also need to inspect all the soldered component connections very closely for cold, thermally intermittant, "frosty" looking solder joint connections. May need large magnifying glass or 10x to 20x inspection microscope to locate these thermal/vibration "fractures" and then resolder them! If you have a capacitor problem, then you will need to carefully remove and replace with new ones. If you are novice at soldering I suggest that you document your work with digital camera or video tape so you can get everything back together with no "leftover" pieces! Teo, all you need to do to find out how BAD the problem of poorly manufactured capacitors is would be to search WEB for BAD CAPACITORS!!! Look for pic's of ELITE capacitors or CAPXON brand. You will be stunned beyond belief!!! Reading is free!! READ, READ, READ. Let us know what you find and do additional comment here on FIXYA. 12fixlouie

Posted on Jan 09, 2010

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1 Answer

Black Screen, Power light on


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!

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First check the vga cable, video cards of your pc.if all of these are ok open your LCD monitor check the power board for boated capacitor, open secondary pico fuse or fuseble resistor, replace it with the same value. The defective lcd panel can cause of dim dispaly but the power is ok.

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Blue cast on the screen? Then check all the pins on both ends of the video cable, try it on another PC to make sure it is not video card problems.

http://s807.photobucket.com/home/budm/allalbums
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Check the cable on your monitor through video card if there is loose connection. Check also the video card by replacing it with your extra video card if you have. I think the problem is not the monitor but the video card.

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Try checking the cables and disconnect all cables from system and monitor and reconnect all of them.

And in case it does not work,Please change the cable coming from tower to the Monitor as it seems that it has gone bad.


Hope this Help.
Cheers!!!!

Jul 22, 2009 | BenQ FP767 17" LCD Monitor

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BenQ FP767 17" Problem: Monitor wont turn on


Check four 5707, two 9204, and one bel 3A slow blow fuse. Also re-solder all cap and transformer.It's quiet common on benq and Dell(benq OEM) 17 LCD. For detail google "benq 5707", sure you can found. Good luck

Jul 07, 2008 | BenQ FP767 17" LCD Monitor

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You have to plug the audio wire from the monitor into your speaker jack on your computer.

Jun 13, 2008 | BenQ FP767 17" LCD Monitor

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IT seems you are not technically trained in electronics.In this case it's difficult to explain via this board,Best you find someone to fix it for you,you can try contacting Benq Support locally.
Sorry for not being able to help.
Samir

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I've repaired my FP767 just today. It had similar problem.
First of all I thought that I needed to replace CCFL tubes.
Then I noticed inflated capacitors in power supply.
I replaced them all and monitor works as new.

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BenQ FP767 17" Power but no display?


Different faults here.
First fault is no power, it is bad capacitors on the power board.

Second & third faults are the inverters. (power but no image visible, but feint if you shine a light into the screen)
Check the 4 transistors on the main power board for shorts.

If you are unsure what that means, then take it to your local TV technician, he should be able to solve it fairly cheaply.

Hope that helps.

Oct 11, 2006 | BenQ FP767 17" LCD Monitor

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