Monitor turning on and off during test

[Lookster123]

https://youtu.be/HQBieCgyv1s
Hello here is a link with what happend during memtest86 test.Please i don't know what to do my computer restarts randomnly but i got no errors. Why is display turning on and off? thanl you

[David (PassMark)]

Looks like the monitor is loosing the physical connection to the video card.
I assume you checked the cable?
Do you have a different monitor / cable to test with?

Otherwise it might be a BIOS bug, where the BIOS isn't masking off the areas of memory used by the video card. So as MemTest86 hits the memory addresses used by the video card causing some random behavior.

But if there was no RAM errors, then there is a reasonable chance the RAM is good.