Question about Dell UltraSharp 2005FPW 20.1" LCD Monitor
Hello dear friends,my problem is pretty simple.when i open up my screen,it stays white with a black bar growing and decreasing in size intermitently.could you help me out by your first guess on what would be the problem??
The problem you are describing is definitely a bad picture tube.please replace it or the problem you are describing sounds like high voltage regulation problems. The easiest way to tell is by changing from a black raster to a white raster. If the size changes quite noticeably or jumps alot then you have a regulation problem. The first thing to do is check your high voltage while changing the raster from black to white. If the HV varies by a large margin, then you have a flyback problem. If it doesn't, check the voltage at the collector of the HOT while varying the raster again. If the voltage changes alot then check your B+ line. Typically what goes out in this case is a capacitor(typically 100uf-350v or so) or the B+ regulator. Hope this helps.
Posted on Jan 26, 2008
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Posted on Jan 02, 2017
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