Question Display problem

Nov 20, 2019
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Hi, I have acer aspire laptop and Intel HD graphics 4000
I recently have this problem after start up or sometime even in start up
I can see background and acer logo even in distorted screen very vaguely. I can enter password and can log in even in distorted screen.
Sometimes it works fine for some period like 5 to 10 minutes sometimes even for 2 to 3 hours.
Is this an hardware or software problem? How can I solve?