Oh! You mean those event logs! Sorry, but since the machine always reboots seconds after reaching runlevel 5, I don't have enough time to do anything on the command line. I could pull out the m.2 SSD and connect it to another machine, but it is in a hard-to-reach place.The events logs are probably in /var/logs/.
You can also look at system logs by entering:
var/log/syslog (this is a very long log)
The dmesg command may show you some things too.
How to View Linux Logs
It's important to understand Linux logs, how to view them, and which logs are most important. Read this mini-guide to give you all the essentials.stackify.com
I'll first try switching the PSU. If that doesn't work, I'll try to get to the SSD.