Seeking advice. Upgraded my Dads PC, 2 sticks of 2Gb 400MHz ram replacing 1 stick 1Gb 333MHz ram. PC old IMedia P4 2.6 PC booted got as far as desk top then screen black no signal reported by monitor. Replaced old ram still same. Checked graphic card on friends PC it works fine. Tried to boot up using onboard graphics, still nothing. Now it get strange. Remove all ram, try to boot onboard, get three beeps, insert 1 stick new ram. PC then boots to windows. Restart no signal. If I repeat, will boot again, but again only the once. Nothing seems to be broken, just playing silly buggers. Bit of googling points towards possibly resetting bios (battery removal and wait). Any advice greatly appreciated.