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Syncmaster 943bwx keeps turning off - Computers & Internet

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  • Anonymous Aug 04, 2008

    I have the same problem. Help.

  • Trentuis79 Nov 18, 2009

    I have the same problem here.. Damn monitor is Just out of warranty too.. thats always the way.. I will never buy samsung again cheap garbage.



1 Answer

This could be ANY problem. The power supply IN the monitor could be going bad. The video card [ u did not say what u have the monitor connected to ] Desktop, laptop (yes! connected externally).Does the power turns off or the monitor goes black??

Posted on May 27, 2008


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Samsung syncmaster 943bwx no display only blue light. check the Dual Enhancement Mode FET(STU309D) - o.k. Capacitor all - o.k. run out of idea. need help please....

All the caps have completely flat tops?

Do you see the backlights try to flash on for a second at least?
You need to check the DC voltages of the 5vdc line and the 16~18vdc line for the inverter circuits using 12v bulb as a dummy load (do not hit the pwoer switch, make sure to turn it off, the power supplies are running the minute it is plug into the wall).
Please note that bad cap can look normal but can have high ESR.
Service manual (not sure it matches exactly to your chassis):
Please read my guide to get more understanding:

Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors pictures:

Learn about bad caps:

Capacitors kit: he can make you a set of caps for you.
Or just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Jul 07, 2011 | Samsung SyncMaster 931B 19" LCD Monitor

1 Answer

Samsung 943bwx . blue light just blinks and get no display. tried diff computers and no luck

Time to open it up and inspec the inside.
Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, 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 SAMSUNG monitors to get some ideas what goes wrong:
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Apr 11, 2010 | Samsung 943BWX Monitor

2 Answers

My samsung syncmaster 920nw keeps turning off. i looks llike it keeps going into the sleep mode

If you see an image(same as without backlite) then the problem is back lite. An expert LCD technician can fix the lamps( By minor soldering on edges of CFL lamps).or replace the panel .covered under warranty.

Dec 25, 2009 | Samsung SyncMaster 920NW Monitor

1 Answer

Vertical colored lines on white background on SyncMaster 740N

Hey dont open the LCD in a hurry......the problem may be due 2 usage of LCD 4 long time better dont on the pc for a day........or in night time keep it under the fan.......this may give a better result........

Nov 09, 2009 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

Syncmaster not showing any image even when it says it's on

If you know a little about electronics? You can open the unit up, find the power supply. Look at the tops of the caps. Are they bulgging on the top? If they are, they are bad. Sometimes there might be 4 to 6 caps that are bad. If the caps you are replacing are 16v replace them with 25v if 25v go to 35v, Always keep the same mfd rating. Some caps are under rated in these ;units. Make sure you don't get them in backwards, I found bad caps in my samsung 740, but this may or may not be the case with yours. Hope this is helpful.

Nov 01, 2009 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

Monitor resolution setting

I would check for new drivers for the video card. They usually have higher resolution abilities for these fancy wide screen monitors.

Jul 22, 2009 | Samsung 943BWX Monitor

1 Answer

Screen image seems to vibrate

it might be a joke program
restart your computer and comment if this helps.

Feb 04, 2009 | Samsung 943BWX Monitor

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