Question about Samsung SyncMaster 940MW 19" LCD Monitor

1 Answer

Samsung Synchmaster 940MW - Will no longer power up.

There's only two circuit boards inside - power and main board. I think the power board is shot. Couple of electrolytic capacitors look to be swollen, leaking. Is there a place where I can buy a new module or get this one repaired?

Thanks a bunch!!

Posted by on

  • eaglejj Dec 06, 2008

    my samsung synchmaster 940mw will no longer power up



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Samsung Master
  • 1,684 Answers


The Samsung SyncMaster 940MW monitor has an issue with the power supply going out. The flashing power light or not turning on are the classic symptoms of this issue. Check out our web site at: We have a step by step repair guide posted that will guide to doing the repair yourself. It involves changing a few capacitors on the power supply. If you can solder then you should be able to do the repair yourself. If you don't want to do the repair we do offer a repair service for $35 plus return shipping. If you have any additional questions just let us know at:

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

Corporate Computer

Posted on Jan 19, 2010


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 Technician 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 repair professionals here in the US.
click here to Talk to a Technician (only 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


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board

Jan 07, 2017 | Samsung Televison & Video

1 Answer

17'' samsung synchmaster 794MG model display but screen shrinks from all sides ,After few seconds display becomes very small just about in single inch size .

hit your MONITOR lightly on left side or right side or on top & then observe will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some monitors on main board ( also on CRT circuit board ) at some soldering joints crack develops....then due to loose contact picture becomes small in size or abnormal width,etc ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some solution is ......monitor main board & CRT circuit board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting monitor lightly if there is no response then main board has to be checked your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again ................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other contact good monitor service engineer .............iam from bangalore - 09986222774 - ( computers, laptop, printers, etc )..............

Apr 14, 2011 | Samsung SyncMaster 753S 17" CRT Monitor

1 Answer

Hi, I need schematic diagram for IP-48135 T board....


The schematic diagram is going to be very hard to get. We do repairs on this model. What information do you need? The most common problem is the capacitors on the power board. You can find this repair guide at: If you need other information then let us know at: and we will get glad to assist you in the repair.

Corporate Computer

May 21, 2010 | Samsung SyncMaster 940MW 19" LCD Monitor

4 Answers

Wont power up,!help

This 2006 model, and more likely to have bad caps by now, please see picture here to see what goes bad in SAMSUNG and other monitors just as well:
Post back what you find inside.

Apr 02, 2010 | Samsung SyncMaster 940MW 19" LCD Monitor

4 Answers

Problem turning on


The slow startup is a common indication of a failure in the power supply board as the other experts have stated. We have a step by step repair guide posted on our web site at: Our article has pictures and instructions to guide you thru the dis-assembly and repair of the power board. You should be able to do it if you can solder. Check it out and see. If you don't want to do the repair we do offer a repair service for this unit that runs $35 plus shipping.

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

Corporate Computer

Apr 01, 2010 | Samsung SyncMaster 940MW 19" LCD Monitor

2 Answers

Hi My Syncmaster 940MW LCD,is cutting out and switching itself off after 10mins or so. Also some times it takes a few presses of the on/off switch to turn it on at all?Can anyone advise please

Power supply board is dead.Replaced the power supply board should solved this problems.Tries Websites, to buy a refurbish power supply board for replacement.

Feb 12, 2010 | Samsung SyncMaster 940MW 19 in. LCD...

2 Answers

Samsung 940MW monitor will not cut on. Green LED flashes only

Most likely it is a set of bad caps on the power board. If you are okay at soldering to do the following with the unit unplugged:
Remove the back cover:
  • Remove the 4 screws that supports the stand and slide it out the bottom.
  • Remove the 3 screws along the bottom of the back plate
  • Use a small flat blade screwdriver or plastic wedge (less risk of damage with wedge) to press on the release tabs around the sides.
  • When removing the cover make note of the antennae connection since you will have to work around this

Remove metal cover over circuit boards:
  • Remove 8 (if I remember correctly)screws securing the metal case. Do not remove the screws securing the LCD panel to the frame

Inspect the power board:
  • Look towards the top of the board for capacitors that have a bulge or brown "gunk" on them. If you have some that are this way this is most likely the problem.
Here's a picture of 4 bad caps on a 940mw. Once I replaced the caps the panel works great and had the same issue as yours.

Oct 09, 2009 | Samsung SyncMaster 940MW 19" LCD Monitor

1 Answer

Samsung SynchMaster 940MW, flickering

Well thats not promising is it

A wild guess here is that the optrics board has failed. If you take the back off can you smell burned electrics. look on the circuit to see if you can detect burn or browned capacitors. Depending on age and value of the set it might be time to replace it.

Please rate our help to keep the FREE service online ++++

Aug 31, 2009 | Televison & Video

Not finding what you are looking for?
Samsung SyncMaster 940MW 19" LCD Monitor Logo

345 people viewed this question

Ask a Question

Usually answered in minutes!

Top Samsung Computers & Internet Experts

Computer Repairing
Computer Repairing

Level 3 Expert

14641 Answers


Level 3 Expert

102366 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

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

Answer questions

Manuals & User Guides