Help needed bios checksum error mobo asus p5n-e sli

[albop]

hey looking for some help today when i turned my comp on i get this message at startup

bios rom checksom error
keyboard error or no keyboard prsent

detecting ide atapi device
found cd rom,tr to boot from it ... fail

detecting floppy drive a media .......
drive a error ....... system halt


any one know how i can fx this

 

[jsc]

Try entering the BIOS and selecting the option to restore factory default values.