Hi,I decided to upgrade the kids computer from a Kd-500 so bought, from ebay, a jetway 830CN mboard & Athlon 850. I couldn't get the machine to install anything without disabling internal cache so tried swapping my Athlon 1400 to test it. The machine made lots of beeps, I didn't count them as I was trying to pull the plug out, & now won't switch on at all. My 1400 is ok, my PC still works but what have I done? & why WAS I having problems? Please help!!