On interrupted boot: “Fan Error”.
That’s a first… BIOS says that there will not be a successful boot sequence because the fan is broken?
The Hardware Maintenance Manual reads:
Error messages
Table 3. Error messages
Symptom or error (beeps, if any) Fan error.
FRU* or action, in sequence:
1. Thermal-fan assembly.
2. Thermal grease.
3. System board.
* Field-replaceable unit (FRU)
In electronic hardware, particularly computer systems, a field-replaceable unit (FRU) is a circuit board or part that can be quickly and easily removed and replaced by the user or by a technician without having to send the entire product or system to a repair facility. The defective unit is found by standard troubleshooting procedures, removed, and either discarded or shipped back to the factory for repair. The new unit is installed directly in place of the defective one.
http://searchdatacenter.techtarget.com/definition/field-replaceable-unit
I would have guessed: Factury replacement unit…