Thanks for your help. I've already hooked up another old monitor to my PC. It works fine. I can reconnect the HP Flat Screen to my PC and I can get a boot menu, the desktop, etc. So I can get it to turn on with power and stay with power but the screen doesn't keep a display. I believe I've tried all of the HP website info troubleshooter info but it really only refers to a "black screen", not a "partial" black screen. I really appreciate your advice.Thanks, Lisa
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