Question about Samsung SyncMaster 220WM Monitor
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Posted on Jan 02, 2017
SOURCE: syncmaster 226bw goes black
If you can still faintly see data on your screen, it will be a faulty backlight in the panel most likely.
LCD panels have fluorescent tubes in them that provide the light needed to see the data. If one of these goes faulty, the circuit that drives it will turn off ALL the backlights, giving you a black screen.
Note: a faulty circuit that drives the backlights will often give the same apparent fault.
You will need to take the monitor in for repair.
Posted on Aug 26, 2008
i think you use tft monitor and after you plug it then lite appear and after few seconds it's gone. plz check the inverter circuit of tft monitor. and may be possible that the life of Flurocent tube is over. if you are not hardware engineer then plz tell any hardware engineer to check the your tft monitor.
Posted on Nov 13, 2008
It's most likely your video card. I had the same problem with that monitor and replacing the video card solved the problem.
Currently using EVGA GeFGorce 8800GS card and working fine.
Posted on Aug 18, 2009
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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