Do you think I have to buy a new screen? I don't have a lot of money so I hope not. what do you think? Thanks
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thanks anyway I think it is fixed after I rebooted my computer I haven't had any problems for about 3 hoursYou can try: other monitor, more connection type with monitor and/or cable, reinstall the video driver, try another PCI express port on motherboard, locate hardware or drivers conflicts, also try to restore the O.S.
Unfortunately you have to go for exclusion by isolating the problem.