In Ricoh aficio 401
The SC360 is Hard disk drive error 1. This means that the machine does not detect the connection signal from the HDD.
CHECK THESE; poor connection between the HDD and the HDD controller,
the AC power connector to the HDD is disconnected,
HDD controller board defective,
Make sure all connections are tight and secure, make sure power is connected securely, make sure HDD ( hard drive) is not bad if so replace. If the above are fine, replace the controller board and if the problem is still there, replace the BICU board.