Another system won't POST

Asus MB M4A87TD
AMD x6 1090T
PSU Aspire Beast 650W

Have it stripped down to just CPU/Stock HSF built outside case.

Power on, fans spin for a second, then it shuts down.
If i disconnect the CPU 12v, it doesn't shut down, the fans keep running,
No beeps...

I don't have an alternate AM3 cpu for testing. New motherboard/CPU.
3 answers Last reply
More about another system post
  1. Do you have a different PSU to try or a PSU tester to check yours.
  2. PSU was working fine in the system I am replacing/upgrading. It was an athlon 64 x2 5000 system with GF460 video. Old MB had an 8 pin cpu power connector, the new has 4 pin. 8 pin on PSU slit to two 4's.
  3. reassembled the old system. PSU still working fine with that.
    I don't know if I should RMA the CPU or motherboard.
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