If you have only the CPU, PSU, RAM, & Windows Drive installed and you still get the CPU and DRAM Motherboard Trouble LED light indicates either a CPU or RAM Memory issue.
Does BIOS show your Processor temperature overheating by any chance?
First thing I would do is run MEMTEST86 to see if your RAM isn't defective with the RAM listed on the QVL List.
Also I would open a AMD SUPPORT - WARRANTY ticket to see if they believe your AMD processor might be defective and needs to be RMAed to be replaced.
I would also open a MSI SUPPORT ticket to see if your Motherboard might be defective or needs to be RMAed to be checked or replaced.
EDIT: Went to MSI and I don't see any AMD processors listed for the 5000 series processors. Either you misprinted the AMD processor and you actually have a AMD 5 -7600 processor and not a AMD 5600 processor.
Note: Found this current AMD Forum Thread also using a MSI Motherboard (not the same as yours) but with the same AMD processor also having Post issues after working: https://community.amd.com/t5/pc-processors/broken-ryzen-7600/m-p/664747#M58191
Personally sounds like a MSI Motherboard issue with the 7600 processor installed.