Switches reboot everyday

[JonathanW]

I have 2 x460-g2 and 2 x440-48p stacked at my high school. Everyday for the past month or so they reboot around 10am-noon. I do not know what causes this, but it's becoming a headache especially getting closer to testing time. Can anyone help me with this? Thanks

[BradP]

I would like to see the switch logs around the time of the reboot, if possible.

[Stefan_K_]

Part of the Logs have been posted in the other topic: 
Switch rebooting daily | ExtremeSwitching (EXOS) (extremenetworks.com) 
We better not discuss the same problem in two threads.

[Jiri_Syptak]

It looks like trouble with the UPS and not with switches