This reply is just to directly answer your post but maybe you should try troubleshooting first to give Support a better understanding of what might be wrong.
Open two Warranty Support tickets, one to your Asus Warranty Support for your motherboard and one to AMD Warranty for your processor from here: https://www.amd.com/en/support/kb/warranty-information/rma-form
See if one or both recommends to RMA your hardware.
Troubleshooting:
1- Any Motherboard Trouble LEDs or Code showing besides the CPU Trouble LED?
2- Remove all RAM except one stick and see if it boots up in case a RAM module went bad.
3-Remove all hardware except PSU, CPU, GPU, Keyboard & mouse, Monitor, and RAM and see if it boots up or the Trouble LED changes.
4-When you power up do all the Case and CPU Cooler fans start running?
5-Any unusual BEEPS when you power up? Might indicate a different hardware at fault.
6-Double check to make sure all PSU cables are tightly installed to the motherboard and all hardware connected.
7-Check your PSU and see if it is on when you power up or see anything unusual.
Sound like something shorted out or went bad. Did you have any Power outages before this occurred?
If everything above checks good or no change then it is best to turn in both the Motherboard and CPU. Otherwise if you RMA the motherboard and then find out the Processor is bad you will be out of a computer twice as long.
Good luck!
