When playing games, shortly after (within a few minutes) the fans goes full speed and the screen turns off. PC seems to still work as sometimes I hear sounds from the speakers. The screen doesn't go back on. Turning it off and on doesn't help. Switching from DisplayPort to HDMI either - monitor doesn't detect any signal. So far only restarting the PC brings the screen back. It started 2-3 days ago. The HP diagnostic tools found nothing.