What can be "buried" spontaneous shutdown of the server?

Question

Iron

Good afternoon!
There is a SuperMicro SuperServer 6026T-TF machine
OS: Windows Server 2008 R2
The following roles are installed: file server, IIS, Hyper-V
The essence of the question is what could be the reason for the spontaneous shutdown of the server? Sometimes it works for 2-3 weeks without shutting down, and sometimes it turns off every 30-50 minutes. There are no errors in the logs when disabling and enabling. The point is that the server does not go into reboot, but simply turns off.
The UPS and wires can be folded out. wires changed and connected the server bypassing the UPS, the problem remains.

Answer 1

My server is down due to overheating of the power supply. If the power supply is connected via standard computer connectors, replace it with a regular computer power supply and see if it will be overloaded further.

Answer 2

The BMC chip is built into supermicro motherboards, it records all hardware events in the "System Event Log". All this is available in three ways:
- through the BIOS in the IPMI section (it seems that I won’t turn off the server to look)
- through the WEB-console (a separate ethernet connector, but you need to configure or view the IP address in the BIOS) -
through ipmi-tools - download on the supermicro website for Linux and windows - https://www.supermicro.com/products/nfo/Management... and https://www.supermicro.com/products/nfo/SMS_IPMI.cfm

Answer 3

From a hardware point of view, there may be an overheating or malfunction of the PSU itself (psu and not ups)
if it will be difficult to look for logs of clean software errors.

Answer 4

If there are no shutdown traces in the logs, then the error is hardware and this is not necessarily a power supply unit.