Asus Bios Menu Corrupt?

Hey,

So decided to format my machine as it was full of all sorts and needed a spring clean, was over 2 years since done last.

Had a few issues like BSOD since trying Bitdefender (coincidence ?) and windows wouldn't update so format was a start to get back to basics.

Got everything redone minus Bitdefender but as I went to F2 / Del the Asus Rampage Extreme IV bios to check

if my SSD was still set right I discovered that the whole menu system is corrupt....cant read or make
options as it just throws random pixel shaped blocks over any movement I make.

The mouse disappears as soon as I move it and any mouse movement or keyboard pressing just adds more random shapes covering any text so I cant actually see anything !!! if I esc and exit, windows hangs for 30sec or so then loads and then all is fine but I fear my bios is somehow damaged or the menu part anyhow....

How can I sort this please
 
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