I have been trying to solve the issue of a pi 3B+ 'crashing' after a few days or weeks.
I have used various power supplies (3A and 6A) as well as different power cables.
The pi boots and runs from an SSD so should not be due to SD card corruption.
Today I found it had stopped responding to http and ssh again, so I went to investigate. I found it powered on but the network yellow and green leds on the network port were out. Looking at the pi itself the green 'ACT' led was flashing 7 times repeatedly. This is apparently because it cannot find kernel.img.
My question is how can a pi that has been running get into this state and what can I try to eliminate this issue?
Thanks for any help with this.