PC turns off after a second when i plug my CPU into the MB from the PSU otherwise runs fine HELP ;-;

[aaronampphegley]

So I recently bought a new case off of newegg the Rosewill Thor V2 and thought why not upgrade some parts as well so i buy a new Motherboard ASUS PRIME Z370-A II LGA 1151 (300 Series) Intel Z370 HDMI SATA 6Gb/s USB 3.1 ATX Intel Motherboard and a new Liquid cool problem is when i plug the cpu into the MB from the PSU it turns on a little red light flashes next to the (CPU) letters and idk what could be wrong everything is plugged in correctly

 

[popatim]

Foremost, you should not have the PSU plugged into the wall until the pc is assembled and you are ready for power. I hope nothing was damaged.

As for the CPU issue, just because it is the same socket does not mean that it will run your processor.
This motherboard will run 8 and 9th gen Intel cpu's

Here is your motherboards' supported CPU's list: https://www.asus.com/us/Motherboards/PRIME-Z370-A-II/HelpDesk_CPU/

 

[aaronampphegley]

Thank you i didnt have a supported CPU processor but have since bought a new MB and Supported Processor (one of the briatles on the one i had was bent on the spu socket) wich also was a problem but thank you very much