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Hello and thank you for your question. I look forward to assisting you today. You can try a system restore to an earlier date to see if that will bring it back?
Would it be possible to send me a screen shot of what the monitor looks like?
Got it. Let me look them over please.
How old is your computer?
Any chance you would have a different monitor you could try?
Also, would it be possible for you to open the computer case and take a picture of the motherboard?
Okay good. I want to eliminate the possibility of any monitor problems before we proceed. Some of the Dell computers in your age bracket, have motherboards that failed around the same time frame. What I am looking for are bad capacitors on the board. Send me a photo when you can and we will go from there.