New PC Build Will Turn On But Turns Off Moments Later

zeffof

Distinguished
Apr 13, 2011
20
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18,510
Here are the components i'm using;

i3 - 3220 Cpu
1x 8GB PNY XRL8 RAM
MSI Z77-G41 Motherboard
500Gb Seagate Barracuda Hdd
EVGA 500w Bronze PSU
LITE-ON Dvd Burner
Generic Rosewill Case

When I tried to boot up the system, the PC would turn on (all fans included) for about 10-20 seconds then shut off without any video being shown on the monitor. I have a motherboard speaker plugged in, but no beeps are heard. The PC just seems to power on, then power off repeatedly until I disconnect the power. The power supply I listed is the second one i've tried, the first being a 350w Antec psu. I have tried reseating the memory but the problem persists.