My pc was hanging up at the boot screen (black forever then the start up beep sound and then into XP log in screen). At that point it had a checkered screen as if it was cut in half horizontilly and then striped vertically with alternating stripes of blue and the actual XP screen. So i opened the case and notice that my psu fan was stalled. I had upgraded the HD about 8 mos. ago and knew I should have upgraded the psu but didnt (lazy). Ok, no big deal. I ordered a new fan with larger wattage as recomended by the emachine web page. Installed new fan. Noticed that my ethernet card was backed up against my Radeon card (reducing air flow by radeon fan and making a bit of a dust bunny) so I swapped their slots for better air flow. (yes radeon card works like a champ and fan is running fine.) Pc started up great on new psu and worked fine for a full day. When pc was turned off noticed high pitched whine/tone/buzz coming from new psu. Too tired, unplugged it went to bed. This morn. back to boot up stall and checked screen. Should I send back new psu (maybe faulty?) or do i have other issues?