yes both....... if the CPU is in it all turns on for a Split seconds all the fans spin starts to live then dies. no CPU no problem but no CPU is a big problem
No CPU? Definitely a problem.
Start over, with the motherboard out of the case.
Put it on a neutral surface, like some cardboard.
Attach only the minimum parts needed to boot to bios.
CPU and cooler
1 stick of ram in the first slot,
vga card and monitor,
no hard drive or sound card or dvd drive.
See how you do then.
Assuming that it works run memtest and add parts one by one.
When it all works put it back in the case. (you DID use the little hex shaped standoffs to mount the mobo I hope?)