about to donate an old pc which I haven't used for quite a while (2-3yrs approx) to some relatives overseas. So obviously I decide to test everything works. Specs as follows q6600 2x2ghz ddr2 667 apacer (transplanted from a separate pc which was working so for sure this is no the issue) Gigabyte 2gb 4850 (tested with and without this installed) 1x750gb HDD this has been tested from another pc so also works Corsair hx620 PSU ( given a visual inspection no capacitors seem to bulging) Gigabyte ep45ds3r mb ( given a visual inspection no capacitors seem to bulging) Now the problem is this I power on pc, fans spin up momentarily, mobo leds power on then shuts itself off. I'm almost 100% sure this due to a dead cmos battery as this pc has been stored in a cool dry environment and was working 100% stable prior to being mothballed, but i don't have a multimeter on hand at the moment to confirm this. Any other suggestions as to what else could be the culprit?