T4900CT
2.4 System Board Troubleshooting
This section describes how to determine if the system board is defective or not functioning
properly. Start with Procedure 1 and continue with the other procedures as instructed. The
procedures described in this section are:
Procedure 1: Message Check
Procedure 2: Printer Port LED Check on Boot mode
Procedure 3: Printer Port LED Check on Resume Mode
Procedure 4: Diagnostic Test Program Execution Check
Procedure 5: Connection and Replacement Check
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