I have a HP F1503 and it is blacking out. I have done some research and I am screwed. My monitor does not fit any of the criteria of those who received new monitors. It's serial number is off by one letter and one month. If you are having problems with your HP monitor and it's serial number starts with CNK and its manufacute date is July 2004, please call this number and request that they log the problem. 1-877-917-4380 They were really nice, but all they could offer me was 10% off my next HP purchase. I said no thanks, I won't buy HP again. But if there are more complaints maybe something was wrong with my model. Good Luck to you all.

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