BIOS crashed PC

[Claret Baskerville]

Hi
I am running a Proliant ML 150 G2 and I am getting an error message when attempting to boot the pc:
"
WARNING!!
BIOS detect failed CPU fans or CPU fans not connected
Please check CPU fans
System will sut down in 7 seconds
"
THe fans are working properlly.
Any ideas on how to fix this issue??

Thanks a lot
Claret

[Carlos_61]

first re-connect all cards involved, maybe there are bad contact, then check connnections of each fan, sometimes the FAN1 is connected en FAN2 connection in the mainboard by example.

[Claret Baskerville]

The fan connection to that specific cpu is not working but if I change the connector the the fan connection below the fan will work.
Now there are 2 places to connect the cpu. I've changed to the other one and the pc will not even start.
Any ideas?