After a BIOS firmware update, what should be checked first if the server shuts down due to overheating?

Checking that the system fans are running is the most immediate and crucial step to address overheating issues after a BIOS firmware update. BIOS updates can sometimes alter thermal management settings or fan control parameters. If the fans are not functioning correctly or not running at full speed, it can lead to inadequate cooling, causing the server to reach dangerous temperatures and shut down to prevent damage.

In systems designed to maintain thermal performance, fans play a critical role in dissipating heat generated by the CPUs and other components. If the fans are malfunctioning, they may not sufficiently cool the server, resulting in overheating. Thus, confirming the operational status of the fans should be the priority action taken.

This approach ensures that there is an adequate air flow within the server, which is essential for maintaining optimal operating temperatures. If the fans are found to be functioning properly, further investigation into other potential causes of overheating, such as thermal paste application or diagnostics, can then be performed as next steps.