Чаще всего это из-за не правильно подключенных FAN.
http://www.intel.com/support/motherboar ... 031836.htm
Посмотрите что все на месте, если что при прошивке FRUSDR выбирайте other, и по факту отвечайте присутствует или нет.
Так же смотрите SEL log, обычно там есть запись not responding, если что-то не верно подкл.
Шить советую S5520UR_EFI_BIOS57_BMC56_FRU26_ME112.zip
============================================================================== BIOS 57 ISSUES FIXED
==============================================================================
- Fixed: TPM hardware status can't be changed without the owner's key.
- Fixed: Fixed 1-5-4-2 beep after the user changes Virtualiazation Tech / Hyper Threading setting in BIOS setup.
Other:
- Added: ACM for Intel(R) Xeon(R) Processor 5600 series update to production V1.2
==============================================================================
BMC 56 ISSUES FIXED
==============================================================================
- Fixed: Fan fault LED is not light when generating lower critical events for sensor 0x39
- Fixed: RMM3 Sensor Readings - Thresholds for Hot-swap backplane read as 0
============================================================================== FRUSDR 26 ISSUES FIXED
=======================================================================
- Fixed: Request for pause on error for Front Panel sensor.
- Fixed: Issue regarding the GID and the Sensor Type w.r.t to SDR data on S5520UR Platform.
- Fixed: "Get Thermal Profile Data" command for fan profile 1 and CLTT should be denied.
