There are many reasons for the failure of blue screen. There are three common types: one is system poisoning or system file damage; Second, the memory oxidation contact is poor or incompatible; Third, virtual welding of BGA packaging chip of graphics card or other BGA packaging chips of motherboard; I suggest you send it for maintenance and testing.

I'll check it for you in Beijing for free and make sure it can be repaired on the same day.

If you are not in Beijing, I suggest you find a reputable and skilled repairer to help you repair it.