Question about BenQ FP71G 17" LCD Monitor

2 Answers

Benq inverter board schemtic

I have 2 HP1940 LCD monitors using a benq inverter board
this board is very very similar to the benq board used in the Q7T4-FP71G monitor .I have downloaded the service manual but the schemtic is not complete ....I seem to have the same problem as everyone else with back lighting only coming on for a second ..can any one help with a full schemtic of a benq board
Peter Australia

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Champion:

    An expert who has answered 200 questions.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 220 Answers

Post me a picture of the board and I might be able to Help.Normally transistors 2Sc5707 are defective.
Samir.
viziks@gmail.com

Posted on Sep 12, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Hello benq q7t4 problem. sometimes does not open.2sc5707 transistors provide all of.The swollen 10v 1000 uf has changed.insurance firm

Posted on Mar 06, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

The monitor switches on and shows benq logo, then screen goes black.Tested on 2 computers and still not working. Have changed capacitors on board but still nothing.


After changing the caps, do you get steady 12~18vdc feeding the inverter circuits? Inverter fuse OK? It can be bad transformers, or lamps also. Pictures will be great help. See where I post my pictures: http://s807.photobucket.com/home/budm/allalbums

Mar 05, 2010 | BenQ FP222W LCD Monitor

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 | Computer Monitors

2 Answers

Benq t905 monitor blank


Fist check the fuse on the inverter board if it is blown replace it if not you need another inverter board as it has fried. But I looked and was unable to find a new/replacement inverter online so I wish you the best of luck

Dec 08, 2008 | BenQ T905 19" LCD Monitor

1 Answer

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

Re: FP71G+


If it's a 71g+ it should be under warranty,Benq offers 3 year warranty.Contact Benq.
Samir

May 05, 2008 | BenQ FP71G 17" LCD Monitor

1 Answer

BenQ FP72G 17" LCD Monitor NO DISPLAY but when i shine a torch on the screen, it shows the display. Does anyone know exactly which compoent i need to replace on the Inverter board ? All transistors seems...


The parts list..Here we go again =)
  1. 4x 2SC5705 (can also be 706 as well)
  2. Bridge capacitors (near the transistors) - Replace
  3. Transformers (can be either 4 or 2 used) - Resolder
  4. Fuse link (Marked with prefix FBxxx top middle of the board) - Replace
  5. 2x Diodes (close to transistors, one for each pair.) - Test
Start with those and if you still have issues post back with a photo of your board from both sides.

Apr 21, 2008 | BenQ FP72G+ 17" LCD Monitor

5 Answers

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

Mar 31, 2008 | BenQ FP731 17" LCD Monitor

1 Answer

Back light goes out after start up


You have BenQ syndrome.
Sounds strange I know, but the power supply in your monitor is a BenQ manufactured part.
The problem is in the inverter section of the power/inverter board.
There are 4 small transistors (marked C5707) 1 or possibly 2 of these will have shorted out. Using a multimeter find the shorted one, and replace both of that pair, even if only one is shorted out.
There could also be other underlying issues as well that caused the transistor to fail in the first place.

Mar 28, 2008 | Dell E172FP 17" LCD Flat Panel Monitor

1 Answer

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.

Samir

Mar 23, 2008 | BenQ FP737S-D 17" LCD Monitor

Not finding what you are looking for?
BenQ FP71G 17" LCD Monitor Logo

Related Topics:

2,831 people viewed this question

Ask a Question

Usually answered in minutes!

Top BenQ Computer Monitors Experts

Tony

Level 3 Expert

2598 Answers

Matthew Spark
Matthew Spark

Level 3 Expert

1042 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a BenQ Computer Monitor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...