Question about Samsung SyncMaster 940N Flat panel Monitor

2 Answers

Monitor is going out...

Samsung 940n is just like the 713n , same problem... it's working 2-5 minutes, suddenly goes out in black screen...it is a hardware error...monitor's bios is deffective..u can't solve it.the monitor's bios is write protected...:D

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  • Contributor
  • 36 Answers

Hello
I am a technician-informatic. I have repaired about 80 Lcd Samsung monitors with theese problems. I offer the repair manual.
Manual has been done with the experience of the repairing Samsung Lcd monitors. Manual was made by me and shows how to open monitor, how
to solve dark screen problem, how to check and replace capacitors, how to solve the problem non-optimal mode (without reprogramming MCU or
changing the main board) photo are included. 100% functional. The repair process is very simple 30-40min. (does not need a lot of
experience in electronics and expensive instruments) and is not expensive. With this manual you can solve problems by yourself and save
money.

"Not Optimum Mode 1280x1024 60Hz"
- The monitor turns on but turns off by itself, the LED blinks green.
- If you detach from the PC points to "control cable" the picture runs continuously in the vertical direction or presents while line , and
as soon as it is reconnected, the monitor goes off.
- The monitor does not turns on and dont dispaly anything, the LED blinks green-lit, if you detach from pc points to "control cable".
- The monitor turns on, works well some time, but after a window apiers "Not optimum mode. Mode recommended 1280X1024 60Hz"
- The monitor turns on, works well only with low resolution 800x600, when try to change a window that reads "Not optimum mode. Mode
recommended 1280X1024 60Hz"

the manual you can find on ebay (my ebay name is asnerejas123):
Samsung monitor repair manual guide 710n,913v,510n more
220498646211
Riparazione - repair Lcd Samsung monitor 710n,913v,510n
220498645860
Reparaturhandbuch für Samsung 710n,913v,510n und andere
220499443698

Posted on Oct 27, 2009

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  • Samsung Master
  • 1,684 Answers

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

Posted on Jul 17, 2009

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Posted on Jan 02, 2017

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2 Answers

Hi. I have a samsung syncmaster 940n black. After i turn on my computer the screen if just black and the blue light(where i turn the monitor on) just blinks.It worked normally yesterday.


The most common problem with the 940N units is a failure of the power supply/back light inverter board. This is easy to repair be replacing 6 capacitors on the power supply. Here is a link to a repair guide with dis-assembly instructions and what to look for and replace and the power board.
http://www.ccl-la.com/blog/index.php/repairing-a-samsung-940n-with-a-blinking-power-light/
And here is the power supply board.



2_26_2012_5_57_53_pm.jpg


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

BuddyMc

Feb 17, 2011 | Samsung SyncMaster 940N 19 inch LCD...

1 Answer

The screen is all yellow. i am using samsung sync master 713N. it was working fine but now suddenly all white has turned light-yellow.


It does sound like a bad monitor, but first! hook a spare monitor to the computer, if okay The Samsung SyncMaster is the problem, caused by the master board which is attached behind the LCD display, the video signals are feed to the main board where the colors are balanced. To repair this would not be cost effective "cheaper to buy new" Now! if the video cable from the computer to the monitor can be detached, sub another cable just to be sure. Finally if both monitors show the same issue, the problem is in the video graphics card of the computer.

Jan 21, 2011 | Samsung SyncMaster 713N 17" LCD Monitor

1 Answer

My samsung 940N acts like a florescent tube, tries to start and doesn't


Use the self test feature.. follow the steps..

1. Turn off both your computer and the monitor.
2. Unplug the video cable from the back of the computer.
3. Turn on the monitor.
If the monitor is functioning properly, you will see a box in the illustration below.
This box appears during normal operation if the video cable becomes disconnected or
damaged.
4. Turn off your monitor and reconnect the video cable; then turn on both your computer and the
monitor.
If your monitor screen remains blank after using the previous procedure, check your video
controller and computer system; your monitor is functioning properly.

Warning

The Power supply inside the monitor can be hazardous and donot open the monitor while power on.

Donot work with the monitor when it is open and the power supply is on.

If there is something wrong with the input signal, a message appears on the screen or the
screen goes blank although the power indicator LED is still on. The message may indicate
that the monitor is out of scan range or that you need to check the signal cable.

Feb 13, 2010 | Samsung SyncMaster 940N 19 inch LCD...

2 Answers

Samsung 713N screen goes black


OK. IN XP GO TO DEVICE MANAGER AND CLICK ON THE MONITER AND UPDATE THE DRIVERS.IF IT TELLS YOU IT CAN NOT FIND A BETTER DRIVER UNINSTALL..REBOOT AND DOWNLOAD NEW DRIVERS FROM CO. WEB SITE.RICHARDM69

Aug 31, 2009 | Samsung SyncMaster 713N 17" LCD Monitor

2 Answers

My monitor 940n samsung syncmaster gone in black...


I have just had this same problem. The problem mostlikely is a blown fuse on the inverter board. Mine was blown on the board and also a Capacitor (470nF/25V) was bad beside the Fuse.

I replaced both and monitor is working now again. After install the picture was a little grainy with little artifacts. In another post i found that the Power Supply board needs to be cleaned for unwanted residue. After that picture was fine again.

BEWARE that you need a soldering iron and a steady hand to replace these parts. If you are unfamiliar with soldering at all have an expert take a look at this. The Power boards uses 220v so DO NOT connect it to the Power when opened.

Starworx

9e48e23.jpg

Aug 10, 2009 | Samsung SyncMaster 940N Flat panel Monitor

1 Answer

Screen goes blank after 2 seconds


Do you have the video set to a range that this display cannot handle? Try rebooting into Safe Mode and set the resolution down to 800x600 or 1024x768 and see if it that will get you back. If so, then look up the specs of the display and set it no higher than it's max.

If it physicaly powers OFF, then you probably have a power issue.

Jan 20, 2009 | Samsung SyncMaster 940N 19 inch LCD...

3 Answers

713N samsung monitor; No display


Necesito Manual de servicio, con todos planos y circuitos, defectología

Nov 25, 2008 | Samsung SyncMaster 713N 17" LCD Monitor

2 Answers

Screen goes black after 2 seconds


Simplest solution may be the screen resolution settings are set higher than the monitor's capabilities. Try lowering the screen resolution and refresh rate in the display properties or try booting to safe mode (press F8 when the Windows splash screen first appears) and see if the LCD will display the windows desktop. It that works, check your video drivers and the screen resolution and refresh rate settings.
If the monitor has the problem in safe mode and/or if lowering the screen resolution and refresh rate don't help then I suspect the a problem similar to one some Dell 17inch LCDs have. On the Dells It is usually caused by a defective voltage regulator transistor in the backlight inverter circuit. Troubleshooting that problem should only be attempted if you have experience at repairing electronic circuitry since it will involve testing individual components and soldering.

Jun 15, 2008 | Samsung SyncMaster 940N Flat panel Monitor

4 Answers

Samsung Syncmaster 940n - white screen


This is a known symptom of a failed power supply board. Here is a repair guide for this unit that shows how to dis-assemble the unit and then what to look for and replace to rebuilt the power supply board and bring the monitor back to life.

http://www.ccl-la.com/blog/index.php/repairing-a-samsung-940n-with-a-blinking-power-light/

And here is a picture of the power supply board.



2_26_2012_6_01_47_pm.jpg

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

BuddyMc

Mar 25, 2008 | Samsung SyncMaster 940N Flat panel Monitor

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