Fans in Supermicro systems, including those with DLC like the SYS-421GE-TNHR2-LCC, are powered by a power cable connecting to the fan board or motherboard. Before removing a fan from its housing, the power cable must be disconnected first to ensure safety and prevent electrical damage, a standard step in Supermicro’s service protocols. PCIe cables (A) connect expansion cards, I2C cables (C) handle communication (not fan power), and SATA cables (D) link storage drives—none are relevant to fan removal. In DLC systems, where fans may supplement liquid cooling, power disconnection remains critical, making B the verified answer.
References: Supermicro fan replacement guides, DLC hybrid cooling safety standards.
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit