I think I may have a semi fried Pi.
About a week and a half back, we had a heavy thunderstorm, and for about
30 seconds the power went off. Later that day I went away for a week. When I returned, I found that I hadn't had any emails from it (it usual sends me at least one a day). It is powered via an anti-surge protector which also supplied a TV booster, external disc and Ethernet switch, I think these are OK.The Pi runs headless, and lives up in the loft (which is rather warm at the moment), on a stand that allows a good air flow around it. I unplugged the power supply, and gave it a minute or so before powering on again, but it wasn't happy. The Pi is connected to the network via Ethernet rather than by WiFi, but only the red light came on, on the Pi. No light for the network stuff, and no light on the switch's port either. The base of case was very hot (it stands on edge with the HDMI port downwards, hopefully giving better air circulation around the PCB).
I've unplugged it and brought it downstairs, and now have it hooked up to the TV. The good news is that it boots (*) and I can log into it. But again no network connection. Looking in /var/log, there are files from around the time of the power spike indicating a reboot, but nothing obviously wrong.
(*)The first attempt to boot failed with it hanging in the boot sequence. I plugged in another network lead, connected to a different switch, and cycled the power, this time it booted, but no network lights, and I can't ping my router.
So. do I have a PI that is useless as an Internet device, or is there something else I can check ?
TIA
Adrian