Question Strange monitor display when going to BIOS and Windows Advanced Options ?

[Poklin]

So i just built a pc for a friend and everything worked perfectly on my end, he took it home and needed to get into bios so i told him how and when ever he tried to go to bios or windows advanced options his monitors display a bunch of white lines with a bunch of duplicates and very very tiny writing. It looks like this. The motherboard is b650 aorus elite ax rev 1.2 and like i said it worked perfectly on my end, bios and everything. We tried some basic things like using 2 different monitor's and using a hdmi and a display port cable also. Apparently it does something similar on the splash screen, image below.

https://imgur.com/faCM1j2

View: https://imgur.com/faCM1j2

https://imgur.com/a/3QQsoFp

View: https://imgur.com/a/3QQsoFp

 

[Colif]

What GPU are you using?

have you tried running off the igpu inside CPU? I can tell its a 7000 series CPU so its an option. Just to see if it makes any difference.

What bios version are you on?

You can tell in windows by looking on the system info app
it shows next to Bios version/Date header, under CPU

that motherboard has Q Flash + so you could flash bios even without being able to see it

How to Flash a Gigabyte Motherboard with Q-Flash Plus - Glenn's SQL Server Performance

Introduction I recently released a new YouTube video, called "How to Flash the Gigabyte B550 AORUS MASTER BIOS with Q-Flash Plus". This video walks though and demonstrates all of the steps required to use the Q-Flash Plus feature on this motherboard. Final Words I think this is a useful video...

glennsqlperformance.com

https://www.gigabyte.com/Motherboard/B650-AORUS-ELITE-AX-rev-12/support#support-dl-bios

its odd it happens in 2 places.

What are specs of the PC?