Question about Samsung SyncMaster 205BW LCD Monitor

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LCD Monitor blacks in and out for 1-2 seconds

My LCD monitor blacks in and out randomly for 1-2 seconds, then it comes back to normal. One time my power went down and when it came up again, my monitor wouldn't start (i was pushing the power button and it would shut off back). I think that's when the blacking out started. This happenes when I'm at the PC or when i watch tv on it (with an external TV tuner).

The monitor is still under waranty but sometimes it doesn't black out for 1-2 hours in a row, so I can't really take it back to the shop untill i know what could be the problem.

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  • keeekeeess Jan 06, 2008

    No, it doesn't have an external transformer, it has a cord just like the computer's. When it blacks out the power button remains blue, like the monitor is running normal. I don't get a 'searching for signal' either.

  • Anonymous Jan 09, 2009

    syncmaster 510n

  • James Stevens Jan 14, 2009

    A friends monitor has the same problem - blue LED turns on for 1-2seconds and then repeats. The monitor image briefly displays. I took the whole thing apart and found that if the CN4 and/or CN6 were plugged in the monitor would continute this power cycling. If I unplugged CN4 and/or CN6 I could get the blue LED to stay on, but still had the display for only 1-2 seconds. With no input ("Samsung test mode") I get the same 1-2 second flash routine. Have also tried VGA and DVI inputs to no avail.

    I do notice that 2 of the power supply capacitors are rounded (C261 and C263) of which I am thinking of replacing just in case it may solve a power supply problem.

    Any suggestions?



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That happened to my lcd monitor, but it would only happen sometimes when something else in the house was switched on, like a light in the next room. i would hear the light switch be flicked and the tv would black out for a couple of seconds...

Posted on Aug 27, 2008

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Does your monitor have an external transformer as the psu ?
If so, try disconnecting at mains for about 5 seconds and re-connect. failing that we'll need to dig deeper.

Posted on Jan 06, 2008

  • martin hogg Jan 06, 2008

    whether the psu transformer is internal or external, from what you say, it does definitely sound like a power supply problem, possibly a faulty internal connection which intermittently makes/breaks the connection........if there is an inspection panel covering the video input from the pc, it may also be worth checking the security of the connection on the vga plug, making sure that the captive screws at both the pc and screen ends of the vga lead are secure, as slack screws can cause faulty connections.....if all is well and fault remains, then take it back to your point of sale. Personally if an item is still under warranty, I would simply take it back and demand a replacement !



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