B650 Livemixer - Red CPU light

Hey y'all, I'm building my new PC and ran into this problem.

Motherboard is an AsRock B650 Livemixer, CPU is a Ryzen 7 7800x3d

After installing the cpu, ram, nvme ssd, air cooler on the mobo and before putting it in the case, I plugged the PSU for a test drive. It posted, everything showed up in the BIOS as working.. After I installed the mobo in the case - no post, red CPU LED indicator on the motherboard. I let it run for 5-6 minutes before turning it off, mind you the test drive boot was almost instantaneous. Rechecked all the connections, tried it outside the case again - red light again. Removed the CPU, no bent pins in the socket or anything strange. Flashbacked the BIOS to the newest update, tried it without a cooler, with 1 stick of ram, nope, same red light and no boot. None of the other lights are shining.

First thing that comes to mind is a possibly faulty CPU, but could it be from the motherboard or something else?

th3immortal55 wrote: Hey y'all, I'm building my new PC and ran into this problem. Motherboard is an AsRock B650 Livemixer, CPU is a Ryzen 7 7800x3d After installing the cpu, ram, nvme ssd, air cooler on the mobo and before putting it in the case, I plugged the PSU for a test drive. It posted, everything showed up in the BIOS as working.. After I installed the mobo in the case - no post, red CPU LED indicator on the motherboard. I let it run for 5-6 minutes before turning it off, mind you the test drive boot was almost instantaneous. Rechecked all the connections, tried it outside the case again - red light again. Removed the CPU, no bent pins in the socket or anything strange. Flashbacked the BIOS to the newest update, tried it without a cooler, with 1 stick of ram, nope, same red light and no boot. None of the other lights are shining. First thing that comes to mind is a possibly faulty CPU, but could it be from the motherboard or something else?

first thing that comes to mind is a possibility of short circuited something (in the motherboard) when installing or bend the board so the circuit broken or broken off a component off mb.

Didn't try the CMOS, no. Already sent the CPU back. Gonna order a new one in a few days. Hopefully that's was the problem, so I can finally enjoy my new build. Gonna update later.