Just put together a new system, when I go to turn it on, it powers on (all fans turn on, including CPU) for less than a second and immediately turns off. NO codes (00, 00) but the Diagnostic LED does show a CPU HOT red led. I have checked the CPU and re-applied thermal grease, but this had no effect, I seriously doubt the CPU overheating is the real issue as it is never on for more than 1 second.
I have checked all power connections, and removed all non-essential peripherals.
Here is a video:
Adam, you may want to test your system out of the chassis just to avoid any grounding issue.
Please use minimal configuration such as motherboard, processor, power supply and 1 memory stick.
Would you please provide me your system configuration?