Dell studio d540 Keyboard failure cant use anything help 10/11/16

Please a while ago there was a powerage outage while my machie was on no sigh of life i took a old psu and hooked it up booted up but i noticed i got a error saying keyboard failure and i cant use it this only has usb no ps2 i was thinking a ps2 converter type thingy or like usb extender for one of the pcie slots to give it a shot i know the computer is like 7 years old no one will look at this post but it is worth a shot and it has ami bios i looked up error messages for it not beep code the error im getting was not there i saw a keyboard error but i don't know really any help will be great than you