We have just purchased a used Poweredge C1100 (CS24-TY). The redundant power supply fans continously speed up and slow down together on a cycle of about 10 seconds. All other fans work normally and speed up and down based on load/heat. We flashed the firmware for bios and the BMC and the PSU fans continue to cycle. Problem is present while in bios or OS. Is this normal?
Firmware:
System Bios: S99C3B23
BMC firmware version: 1.84.27356