Okay so I recently installed a R4890 series graphics card and I had to remove the CMOS battery for 30 seconds for the display to work but when it boots up it stops at the screen that shows what key to press to go to the Bios and the boot menu but my keyboard won't work, I've tried a usb and ps2 connected keyboard. Also I installed some new RAM so I don't know if that would effect anything or not. Thanks for any help!