What to do after power down for overheating

I have a Qnap HS-251+ that’s been running great for quite a while now. Firmware regularly updated, no major problems until yesterday.

First I got the following alert:
Message: [Hardware Status] NAS temperature has exceeded the threshold: 65℃. The NAS will power off if the temperature exceeds 75℃.

And then less than a minute later got the following alert:
Message: [Hardware Status] Powering off the NAS due to overheating. The NAS temperature 127℃ has exceeded 75℃.

I unplugged the NAS and let it sit for a while (overnight). Today I plugged it in and powered it on. I can hear it power on and it’s slightly warm to the touch (though not hot/not abnormally so), but it’s not showing up on my network and can’t be found with Qfinder

I’m trying to determine what troubleshooting steps I can go through and/or how to see if it’s even booting up properly. Any ideas on what to try?

Thanks!

The NAS could be facing the LPC death, where the superIO is reading the wrong values…amongst other issues

You might have to look into a repair a
or a replacment

Probably won’t make a difference, but worth a try to pull the drives and see if it will boot up into setup.