Hi Wagner >By exploding you mean a SMPS capacitor just ruptured? >There is no other thing in there to "explode". >A ruptured capacitor will definitely drop the voltage its output voltage, >so no further problem could be done, the power supply itself will shutdown >due lack of "power good return line" from the motherboard. > Yes, post mortem revealed a totally ruptured capacitor. This explosion occured right after I pressed the ON button and believe me, the power supply did not shut down. It kept going, but the PC did not boot. I had to replace the motherboard, CD-ROM and CD-RW drives plus the power supply. I agree with what you say about the data back-up process, but do all PC users *really* have to always be ready for exploding power supplies? Alan -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads