Dl580 G8 bios screen corruption in legacy mode

[Bootlegin]

I'm having trouble with my friend's DL580 G8 where his bios screen gets severely corrupted when booting in legacy mode.. The screen usually goes almost completely blank with only the HP logo showing up and flickering, but sometimes the screen will turn mostly yellow and completely big out. Why is this happening? We've tried updating all of the drivers to the latest version, including the ilo and bios firmware, but no luck. In UEFI mode, the screen looks fine and I can see all of the initialization info, but not in legacy mode.

[ManBha]

Hello,

Please ensure the server firmware like iLO and BIOS are updated.

Also, try to restore to system default settings : refer page 117
https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=c03886429

Thanks.