precision 7530 - fan stuck at maximum speed

HI there.

my service expired the 8th of January.

Everything went fine till today.

When booting, it entered the "Manufacturing mode active". I made the Diagnostics and I had these two messages:

Version: build 4400.13 UEFI ROM
service tag: --
Error code: 2000-0511
Validation code: 79122
Fan - The (Video Fan) fan failed to respond correctly

Version: build 4400.13 UEFI ROM
service tag: --
Error code: 2000-0511
Validation code: 79122
Fan - The (Processor Fan) fan failed to respond correctly

I updated the boot, tried with and without the battery.

Nothing changed. The laptop is not usable in this condition. Temperatures looks OK, fan just start at maximum speed from the boot.

Any idea?