Question about Samsung Syncmaster 940BW LCD Monitor

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Displaying issue First let me say I have had little problems with it for a long time and it has worked very well. Recently when I turn it on it displays for about 1-2 seconds then goes black, it is still on and the power button stays lit (not flashing) if I turn it off and on again it displays for a second and black again, with some fiddling with buttons it does the same thing and it seems if I fiddle enough it stays in working order until I shut it or the cpu off. I am not sure if it is just going out or what, but I would be thankful for any help.

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Hi,,,there,
That's indicated your backlight inverter are busted. Need to replaced a new one or repaired it. To repaired look for a bad capacitors with a bulged on top of each caps. Not sure, just replaced all the caps... Have a nice weekend!

Posted on Oct 11, 2008

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Posted on Jan 02, 2017

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Displaying only 2 secs


Monitor STFC (Self Test Feature Check)
* Turn off the monitor
* Plug the monitor power cord directly into the wall socket to remove any surge protectors or APCs from the troubleshooting equation
* Unplug the monitor video cable from the back of the computer
* Turn on the monitor
* The floating dialog box should appear on screen against a black background. If the issue appears during the STFC, the monitor is defective. Get it replaced.

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Screen flashed and stopped displaying widescreen


Usually this is because the display has been changed from 16:9 (widescreen) mode to 4:3 (standard) mode. On the front panel there's a button labelled "4:3 in Wide." Press this button to return to Widescreen mode. If it says "OSD Locked" then you need to hold the "Menu" key for several seconds to unlock the controls, before changing it to widescreen.

If that doesn't correct the problem then you need to adjust your computer's output resolution to a 16:9 ratio like 1920x1080 (1080p) or 1280x720 (720p.)

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well mine came with a three year warrintee, so iv sent mine back twice already, worst moniter, try finding your receipt and then going on to acer's online support

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It recently started flickering when I turn it on. It did this for several minutes before displaying normally. Then it wouldn't display anything at all until I turned it on and off several times. Then it...


duffy325, Don't mess with it!!! Get SAMSUNG to give you a new or REFURBISHED unit t0 replace your BAD unit. Your unit is behaving like I would expect a 3-5 year old unit. It's got a power supply problem, not a front panel switch gone bad problem. FYI also visit YOUTUBE for the longer video clips of "LCD monitor disassembly" and "LCD monitor repair" to find out some common KNOWN failure mechanisims why they fail!! You will be amazed! With your unit's behavior I suspect a "flakly backlight or SMPS/INVERTER" problem. bye for now. If this was of some help, do rate this response on fixya. 12fixlouie

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Sounds like you could have a capicitor problem, which is fairly inexpensive to have fixed - before going down that route - If you only connect up the suspect monitor to your PC and disable dual screen using the cables (power and signal) from the one that is working - does the same thing happen? if so then it's definately the monitior and most likely a capicitor.

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firstly stop turning it off and on because you will blow something else like a power board then it will be a big paper weight.
next get a torch and when it is powered on and supposed to be showing images, shine the torch at the screen.
if you can see everything then you have a broken backlight or problem with your backlight and connections.
they cost approx £15 and a little labour, its not a big job. you may be able to do it yourself if you can get hold of a service manual.

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It didn't get moved closer to something else that could generate an electro-magnetic field, did it?

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