See the following:
Diagnostics on the MP RS-232 interface board port 0 failed.
The board may have failed or may not be installed in the MP.
On an MP-30 system, diagnostics on the MP RS-232 interface board port 0 failed.
The board may have failed or may not be installed in the MP.
On an SMP system, diagnostics on the PH9/PH10 RS-232 interface on the DCC card has failed.
For more information, see "MP Error Codes".
You should contact your Giddings & Lewis service representative.