Im having this on off problem... when i successfully upgraded my pc and doubled check all connections, i tried 1st boot today. but without the chance to see any screen, the whole system off itselves, then after a few seconds on again,then off...keep on repeating. this supernatural phenomena keeps on troubling me, any high level exorcist there can help me solve it?

cpu: i5 (new)
mobo: p55a ud4p rev 2.0 (new)
ram: hyperx lovo (new)
gc: 8800gt (used)
dvd rom: used
hdd: wd 500gb (used)
psu: odin pro 800w (used)

the used components are working fine before i transfer them to new system.

today i went to pc spec for them to check, they said bcoz i din reformat my hdd.. yet after reformat the same problem continues... i wonder how did they check@@

absolutely not mobo short circuit as i tested the whole setting on eletrostatic bags~

grateful for those having same experience before and willing to help