Question about Samsung SyncMaster 940B 19" LCD Monitor

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Syncmaster 940b backlight repair solder - Samsung SyncMaster 940B 19" LCD Monitor

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3 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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budmrtn
  • 11361 Answers

SOURCE: The screen syncmaster 940b comes on momentarily

Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Posted on Jun 10, 2010

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budmrtn
  • 11361 Answers

SOURCE: Hi. I want to power my syncmaster 940b from 12

Here are the service manual: http://elektrotanya.com/?q=showresult&megnev=Samsung%20&megnev2=940B%20&kategoria=&kat2=all

You may be better off getting a small inverter that convert 12vdc to 120vac @ 100watts or more.

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

Posted on Aug 01, 2010

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My samsung 940b it has a clear bright screen ( as normal ) just for 2 seconds then the screen turns dark but you can see very very dim Window logo.Turn off the power ( does not matter for how long ) when...


Shine a flash light onto the monitor, if you can see icons/desktopon the screen then you know you need a new monitor!
You should be covered under warranty!

Mar 02, 2011 | Samsung SyncMaster 940B Monitor

1 Answer

The screen syncmaster 940b comes on momentarily and the fades out, if you turn the screen off then on it does the same thing.


Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Jun 10, 2010 | Samsung SyncMaster 940BE 19" LCD Monitor

1 Answer

Backlight going bad?


Hello,

This is not the backlight its the power supply board. We have a repair guide posted on our web site at: http://www.ccl-la.com/blog/index.php/samsung-204b-lcd-monitor-repair/ The repair consists of replacing 5 capacitors on the power supply board. If you can solder then you can do this repair. If you don't want to do the repair we do offer a repair service, you can get this information here: http://www.ccl-la.com/blog/index.php/service-request-form/

I hope this helps, If so please rate our solution.

CCL_Tech
Corporate Computer
www.ccl-la.com

Apr 28, 2010 | Samsung SyncMaster 216BW Monitor

1 Answer

The monitor suddenly looks as if the brightness is set to minimum (very dark - you can see shapes moving, but the text is unreadable), but it is not responding to any changes to brightness in the menu. Can...


Hello,

It sounds like you have a monitor with a common problem. After a few years some LCD monitors will blow a power supply. The problem is caused by parts called capacitors overheating in the confined space of the monitor. If you are good at electronics repair/soldering you can usually fix the problem. Check out a few pictures on my web site www.ccl-la.com/badcaps.htm You can take the back cover off your monitor and look for the bad parts,replace any that look like the pictures and your monitor should work fine. The capacitors do need to be installed with the correct + and - connections, note the stripe on the old one and insert the new one the same way. If you don't want to try the repair yourself we offer a repair service for $35 plus shipping.

I hope this helps, if so please rate my solution.

Buddy
Corporate Computer
www.ccl-la.com
Over 21 years of computer and printer support/repair

Jul 08, 2009 | Samsung SyncMaster 940B Monitor

1 Answer

SyncMaster 940B


Sounds like you have a video card problem. If it works on someone elses PC and not yours. Replacing this video card on your PC should fix it..

May 14, 2009 | Samsung SyncMaster 940B 19" LCD Monitor

1 Answer

Screen goes black and have to restart


looks like you have a DRY SOLDER or COLD solder , if your handy with tools , you have to open monitor and check the PC BOARD, specially where some transformer is located look around that area for some burnt spot , re solder it , and try it again , should be working properly , hope this helps AJ

May 02, 2008 | Samsung SyncMaster 940BE 19" LCD Monitor

1 Answer

No Video on Monito - Blue Power lite is on


Hello.
Sounds like the backlight inverters or CCFL tubes are at fault.
Turn the monitor on with it connected to a known good SVGA signal source that is sure to have video. (Like the computer when it is operating.)
Hold a flashlight to the screen of the monitor and see if the faint video can be seen through the screen.
If the video is faintly present on the monitor screen using this method of illumination, then either the CCFL inverters / Inverter board has failed, or the CCFL tubes themselves have gone bad. (CCFL = Cold Cathode Fluorescent Lamp)
This should give you a better idea of how to proceed, repair or replace.
If it is the inverters or CCFL, Repair costs for a DYI project could range from $70 to $120 depending on the level of your expertise and parts availability.
Good luck with your quest.

Nov 01, 2007 | Samsung SyncMaster 940BE 19" LCD Monitor

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