i got a duron 1600, 256mhz pc266 ddr on a asrock k7s8x motherboard. lately ;lately, i tried testing a sempron 2400 on my motherboard. it did work quite wellbut after a while it just black out. i put back my original processor but it does not boot up anymore. there's power and all, but no display. what possibly the problem? my system before i test was working properly before i test the other processor.