ok im running xp pro sp2 but that doesnt seem to matter in this situation i opened up my comp and cleaned out the dust. i reassembled everything and it all seemed to be at the rite place. double checked and everything. i turn on my pc and it doesnt boot up. nothing shows up on the monitor. it gives a half-sec beeep when i turn my comp on and beeps every 3 seconds. the beep seems to be near the processor. i know its some kind of internal problem but i checked EVERYTHING. i plugged everything at its proper place. help me please? im running an emachines t1600. usually, it would go to the emachines logo screen then boot up. but this time, the comp doesnt even communicate with the monitor!!