Hi, I'd like to see if somebody have any idea of what's happening to my sistem: a Medion M3 Composer with Mobo: MSI Ms-7046 socket 775, P4 3.0HT, DDR-SDRAM. It has been working flawless for about a year, two days ago, I go boot it, and the WinXP splash sceen got frozen. I powered off the PC and powered on again...Single long beep, that repeats regurarly and no video...no boot. I tried to reset the CMOS by removing the battery. When I powered the PC back on, it shut off immediately and by itself re-powered on after 2-3 seconds doing the same long beep, no boot, no video. I tried all kinds, removed, all devices, tried one by one the RAMs, installed another CPU, etc. all with no success. I tried anothe MoBo, but didn't finish booting (!)...it shut off by itself after a couple of BIOS screens...maybe this motherboard is not fully compatible with the system...or faulty PSU??? Unfortunately when I put the orignal MSI MoBo, and put power, I didn't got any self-suts off...but I smelled what I shouldn't have smelled!!! ANY HELP, CLUE??? THANKS!