About a 2 months ago my FW13 with 7840U (Fedora 42) started crashing while sleeping - not always. Maybe once or twice a week. When I say sleep, I mean whatever the default sleep for Fedora linux is, NOT full hibernation.
When this happens I see the the caps lock key flashing rapidly. A 10-second press of the power button force reboots and the machine works fine for another week or so.
I gather this is probably an indicator of some kind of hardware failure. Since I’m not a linux sysadmin, any pointers on where to look to narrow down what might be going south? RAM, SSD, etc. I imagine there’s logs, … somewhere.
Once your system restarts, you can get logs of the previous boot by running this: journalctl -k -b -1 --no-hostname.
As for the blinking, usually means hardware-related issues like you noted. It’s worth re-seating your memory and storage sticks (For me, re-seating the storage stick did the trick when I had the same issue a few weeks ago).
It’s not exactly an indicator of hardware failure. It’s an indicator that the kernel has crashed. Instead of Windows’ famous blue “bugcheck” screen, Linux blinks the LEDs on any connected PS/2 keyboard.