Powering down & Power L.E.D flashing

I just brought and setup an AMD Athlon 64 3400+ processer along with a
MSI K8T Neo.. however when i power up the system runs fine for about
20 seconds or so then it switches off and the Power L.E.D starts
flashing, i've tried disconnecting the power cable and trying again,
the same complication is repeated... How do i go about fixing this
problem and/or what is the obvious cause/reason for such ?

"CjB"
wrote in :
I just brought and setup an AMD Athlon 64 3400+ processer along with a
MSI K8T Neo.. however when i power up the system runs fine for about
20 seconds or so then it switches off and the Power L.E.D starts
flashing, i've tried disconnecting the power cable and trying again,
the same complication is repeated... How do i go about fixing this
problem and/or what is the obvious cause/reason for such ?

Did you use thermal paste (or a thermal pad) between the processor and
its heatsink?

Is the processor's fan spinning? How about any other fans (that have an
RPM signal)?

Is the power supply wattage capable of handling the load? Have you
tried unplugging all expansion cards, except video, and all drives
(except one of them), all USB devices, etc., to minimize the load to see
if the system then boots okay?

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