Screen flickers while typing

techtata

Regular
Messages
602
ISP
Tata Indicom
Hi,I am using Fedora 16 and whenever I type on my keyboard the screen starts flickering for no reason. My keyboard is new and it works fine with other pc of mine. The problem gets worse when I use the backspace key and my numlock does not work despite being on. What could be the reason? Please help, this is driving me nuts. thanks.