robobond

after recently switching out my power supply ive run into some roadblocks. first upon start up with ps/2 keyboard plugged in the lights flash once on the keyboard then go off and i get stuck at a screen that says cmos checksum bad as the keyboard no longer works. upon removal of the keyboard and a restart the computer will load up to windows and im aloud to use the ps/2 mouse however if i plug the keyboard back in then the mouse stops working. i am however aloud to use my usb mouse without this problem. currently am using the osk. in case it helps: motherboard: asus p4v800d-x processor: p4 3.00 ghz memory: 1 gb any help is appreciated

yes i have the correct power supply(400 watt). the lights power on fully then goes out. how do i set that Legacy USB is set to auto in the bios without be able to use keyboard?

yes correct ports, no bent pins and everything was disconnected upon installation of the power supply. have tried other keyboards. computer is self built and make and model is in first post.

anyone? id really like to get this fixed. worse comes to worse i suspect a usb keyboard should work.

the computer will not boot if keyboard is plugged in but will if either ps/2 mouse or usb mouse is. atm the keyboard will not work at all. it lights up then doesn't work. also its a working keyboard.