Which model 900w or LE1936 ?
This info is usually on a sticker to the side of the stand.
If the 900w: You problem is probably that the capacitors on the power board have gone bad and need replacing. May also have transistor problems.
You would have to open it up to get a better idea.
I can probably tell from a picture.
If it is the LE1936: then it could be a similar capacitor problem, but it is rarer on this model than the 900w
Also on this model, there is a voltage regulator on the vga-dvi board that tends to go bad.
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