Hi everyone, a few months ago I put together a computer and found out it had a bad stick of memory as well as not being able to shut down. I got rid of the memory, but the problem still persists. When I click "Shut Down" in the Windows Start menu, the computer will go through the shut down procedure, the monitor will shut off, but then the lights and fans in the computer will continue working. A red CPU_LED light on the motherboard flashes repeatedly. If I click the power on button it will turn on just fine, and the computer restarts and goes to sleep fine as well. Is this a power supply or motherboard problem?
Windows 7 64-bit
ASUS P8Z68-V GEN3
Seasonic S12II 620W
1TB Seagate HDD
4GB RAM (had 8 but as I said, one stick was bad)