Toshiba TECRA M9 Maintenance Manual page 69

2.4 System Board Troubleshooting
Procedure 2 Serial Port Check (Boot Mode)
Check the D port status by a serial port test. The tool for serial port test is shown below.
The test procedures are follows:
1. Connect the RS-232C cross-cable to the connector CN34200 of the system board..
2. Connect the RS-232C Cross-cable to the PC that displays the test results.
4. Boot the compute1r in DOS mode.
5. Execute GETDPORT.COM in the text menu in CPU REAL mode. (Insert the FD for
starting D port into FDD and input "FD starting drive:>dport".)
The D port status is displayed in the following form;
6. When the D port status is FFFF (normal status), go to Procedure 4. When the D port
status falls into any other status than FFFF, go to Procedure 3.
TECRA M9 Maintenance Manual (960-631)
Figure 2-2 A set of tool for serial port test
[CONFIDENTIAL]
2 Troubleshooting Procedures
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