Re: LCD Monitor
Yes, I think know what might be the problem...
It sounds like your LCD backlit light is having a problem initalisizing when being booted up and staying on afterwords.
What you can do is either take this to a DELL store and have them look at the back light and make repairs by replacing that part or take it to a shop and have them do it.
It will probably run you near about 40.00 bucks for the repairs since it should be fairly simple to fix.