My E-machine would not boot because of its fried Mobo and CPU. But I only found that out once I had already bought a new power supply, cpu and motherboard and tested the new cpu in the old mobo and the old cpu in the new mobo. The power supply was fine. I kept the old parts (ram, hd, cards, cdrw and dvd). I purchased a PC-Chips mobo that suited the socket 478 celeron. BTW, that's a laptop proc. Windows keeps restarting the machine, but I'm working on that. I'll re-install XP from the e-machines disk. I verified all was working fine by booting Damnsmalllinux from the CD drive. Beauty!