I have dell rebranded p991 , excellent monitor but it's been dieing over the last few months and I hate to let it go. if you have owned one of the Sony trintrons I'm sure you know why I don't want to get rid of it. They don't make them anymore and I can only find refurbs or the really large ones both of which are really expensive. The color is slowly fading and becoming washed out. After some searching I've found this is common problem, if you have had one of these monitors in the past and had this problem and have since discarded you may not want to read on.
Apparently this issue crops up because of failing 10 cent resistor.
If you do have one of these you may want to bookmark this link:http://icrontic.com/forum/showthread.php?t=19549
Lot's of good advice, the first thing I did was some advice I found about 2 or 3 pages in. In the monitor menu go to options, then select "color restore", I would have done this before but the option doesn't become available for about 30 minutes after you turn the monitor on and wasn't aware of that. This has helped a little but its not anywhere near its former glory. Anyhow I'll be trying the resistor fix next, from the posts in that link it appears it works for everyone.
I'll let you know how it works out.