Question about Computers & Internet

1 Answer

Benq 937s monitor problem

Thanks for your response on my monitor problem. I have looked long and hard at the electrolytic capacitors, but can see no bulging or leaking. Could they still be at fault or should I look elsewhere. I have had experience in soldering and the like so is not a problem to do, but I don't want to start pulling stuff apart until I am confident I have homed in on the problem. Any further comments?

Thanks, Lucksafortun

Posted by on

  • Lucksafortun Jun 12, 2008

    Well Russolini I went ahead and changed all 4 electrolytic caps on the power supply circuit and bob's-me-uncle...It is working again.

    Thanks a lot.



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Expert
  • 47 Answers

Hi again,
They can most definitely still be at fault - here's where it becomes tricky. To properly test electrolytic capacitors you need an ESR meter - not cheap - or you could spend the $150 on a complete set of replacement caps instead. You're really rolling the dice either way, because it might turn out to be a bad transformer or something completely different. I've fixed 15-20 LCD monitors and the problem is almost always a cap, some are visible and easy fixes, others have stumped me for days and days until I just start replacing caps in the hopes of lucking out.
One of the things I tried when I first started doing it was searching google for the model number of the monitor to see if anyone else had fixed one and might know which parts were bad.

Wish I could help more, sorry it didn't end up being an easy fix. Maybe it's worth calling the computer/TV repair shop and asking how much they'd charge to fix a LCD power issue.

Best of luck,

Posted on Jun 11, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

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

Jan 09, 2010 | BenQ Computers & Internet

1 Answer

Benq FP92G Display couple of seconds then blank. LED still green.

budged electrolytic capacitor nearby high voltage transformer. 220microcarad/25Volts. apply fresh solder and re-connect lamps.

Jun 01, 2009 | BenQ FP92G+S (Black,Sylver) (Silver,...

2 Answers

Benq 937s monitor stopped working. Green light on but blank scree

this is caused by the transistors that drive the backlight transformers, they are not expensive check out ebay for the parts & tutorial on how to fix it yourself

Mar 17, 2009 | BenQ FP937s+ (Silver) 19" LCD Monitor

1 Answer

My lcd monitor died does nothing

Try replacing the large electrolytic capacitors on the power supply board (should be 4-6 capacitors for 5 and 12v rails). This works in most cases.

Dec 19, 2008 | Computers & Internet

1 Answer

LCD Monitor is black... blowing transistors

Bulging or "blown" electrolytic capacitors are a common problem with LCD monitors. If you replaced them with correct parts (voltage rating) then one of two situations comes to mind:
1. Electrolytic caps are polarized, if you install them backwards they will blow quickly.
2. The voltage the circuit provides exceeds the rating of the cap. A 5 volt cap in a 12 volt circuit will blow quickly. The voltage regulation circuit may not be working.
Monitor Mike

Oct 01, 2008 | Computers & Internet

1 Answer

Kds vs-f14

There is usually an identical resistor somewhere else on the circuit board, so if you cannot read the colors of the burnt one, you can read the colors from an identical resistor on the same board. If you just replace the resistor, it will probably just burn out again or damage another component, you have to find the cause of the resistor burning out, most likely an electrolytic capacitor failing. Look for bloated or seeping capacitors and replace those as well. Also look for broken or burnt toroid coils.

Jul 15, 2008 | BenQ FP731 17" LCD Monitor

2 Answers

Benq-q7t3 no picture


Jun 21, 2008 | Samtron 96BDF 19" CRT Monitor

3 Answers

Unexplained Blank screen.

Looks like your Power Supply has gone Kaput .. Usually it is the Electrolytic Capacitors on the Power Supply Board, try a new one, or replace ALL the Electros with same or better ones.

Jun 21, 2007 | BenQ FP731 17" LCD Monitor

1 Answer

Samsung syncmaster 175v

This is most probably cause by one or more Faulty Electrolytic Capacitors, I find these are the MOST commonest form of "Fault" in these LCD's TFT's units. I ususally simply replace "On Spec" all High Value Electros, in fact ALL Electro's are suspect and often I just "Shotgun" and replace 'em all. Usually fixes all problems. Always use High Temperature Caps.

Jun 08, 2007 | BenQ 19" FP931 Flat Panel LCD Monitor with...

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

436 people viewed this question

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers


Level 3 Expert

102366 Answers

David Payne
David Payne

Level 3 Expert

14161 Answers

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

Answer questions

Manuals & User Guides