2.4 System board Troubleshooting 2 Troubleshooting
TECRA M4 Maintenance Manual (960-521) [CONFIDENTIAL] 2-31
Table 2-3 Debug port (Boot mode) error status (10/10)
D port status Inspection items Details
Clear of IRT status
F121h
Update of check sum of
Runtime side
FFFFh End
Check 1 If the D port is status F11Dh or F11Fh is displayed, go to “HDD Trouble shooting
Procedure in Section 2.6.
Check 2 If any other D port status error code is displayed, perform Procedure 3.
D port error code is as follows:
Error code Contents
F117h Exception error
F120h Clock generator error
F11B3h/F11B4h SC initialization error
F1BBh BIOS update error
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