I recently built a new pc, msi b450m mortar max, ryzen 5 3600, gtx 960, 15gb ram, 700w psu, everything was working perfectly fine, until I decided to update the bios, which crashed the motherboard, so I flashbacked the bios and got it working out of the case, once back in the case, the ezdebug cpu light was on and not posting, back out of the case and flashed again, and working again. At this point I thought it was the IO shield so I removed this as some of the metal shards were bent, and didn't risk bending them back or putting it back in. So I completed the build and put it back In case and the same error light came back on. This time on inspection. Of the motherboard some of the standoff holes had been scratched and some of the standoffs were scratched this was due to when I was removing the board. So I believe this is what is causing the MB to keep crashing, I have ordered some new standoffs in the meantime, however I want to check if it is the actual motherboard standoff surround the holes.