Question about Samsung SyncMaster 910T 19" LCD Monitor
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!
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
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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