Question about Samsung SyncMaster 910T 19" LCD Monitor

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Syncmaster 910t blinks image perfectly once and goes back to black

I just got this samsung syncmaster 910t monitor that displays the image at full color with brightness but only for a fraction of a second and then goes black again. Power light is on and everytime I press the "source" button it blinks a small white square with "digital" written on it on the top left corner follow by the full image with "analog" on the top left screen again. Any suggestions? It seems to be an incredible screen and there is no way I could afford one of these so I would REALLY appreciate your help! Thanks!

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  • xEuS Oct 19, 2008

    Yes, it's a used monitor. I have done the flashlight test now and I can see the image displaying and all the front buttons are responding. I have opened it and all the capacitators seem intact and well welded. I don't have a tester now but I have ordered one. What should I check then? Thank you very much for your help by the way :)

  • xEuS Oct 19, 2008

    Sure thing! In the board you can read P/N: BN44-00106B on the top corner and Model: PWI1704SG (B) Rev1.0 if that helps.






    I have sent you some hi-res pics to your e-mail. 


    Thanks for your help! 


    P.S.: you are F A S T in answering! :)

  • xEuS Oct 19, 2008

    I've sent you 3 bigger images to your e-mail address. my e-mail is nelsonmoreira@gmail.com. Didn't you get them? 


    Thanks

  • wordsofglass Jan 13, 2009

    Hello, did you ever fix this problem? I have the same model and after 4 years (3 is the maximum warranty service), one day, I booted up and the inverter went out. Still blinks my login screen once, but then goes black. The only difference is my PSU/inverter is listed as PWI1704SG(A) Rev 1.0.

  • Anonymous May 18, 2009

    Need help, i hawe same problem.

  • Fran Bednar
    Fran Bednar May 11, 2010

    Thanks.

    Larger picture will help (I'm having a hard time seeing the plug to the
    video board). What you have is a combination power-inverter board on
    this monitor and a 4 bulb screen.



  • Fran Bednar
    Fran Bednar May 11, 2010

    Can you post a picture somehewre or email me one.

    That will give me a better idea as to what you actually have in that monitor.

    bammbamm@ptd.net



  • Fran Bednar
    Fran Bednar May 11, 2010

    I assume that this is a used monitor ?

    Do you have the capabilities to open it up and a tester if needed for testing voltages ?

    It sounds like a typical lcd monitor power- inverter board problem.



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I've had same problem and I fixed it!
With good CCFLs, clean supplying voltages, all good capacitors and resoldered junctions, the backlight still turns on for fraction of second and goes off.
It is in the Power Supply / Inverter board. In the Inverter part there are two dual n/p-MOSFETS U3 and U4 (models STS7C4F30L, SO-8 packages). I've found they both have too high ON-Resistance (perhaps due to age and constant overheating). All you need to do is to replace them. I've checked many models and found closest by Rds and IDcont (continuous drain current) are IRF7389, you can find distributor by findchips.com, but I've bought them at newark.com, they're cheap.
The hardest thing was to unsolder old chips, they are glued to PCB and because of overheated material under them, the copper could easily go apart. Therefore, the best is using fine tips cutters, cut off all legs one by one and then take chip body off the PCB and take legs from pads by iron. That's all you need. After that my monitor started working as new even with old CCFLs. Good Luck!

Posted on Sep 09, 2009

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I found a site that sells your (our) part: samsungparts.co. Look up that model number for the power supply under "Part #" and it seems to run about $60-70. I'm probably going to order one and give it a shot as a drop in replacement.

Posted on Jan 13, 2009

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