2 Troubleshooting Procedures 2.4 System Board Troubleshooting
2-16 [CONFIDENTIAL] PORTEGE M700/M750 Maintenance Manual (960-661)
2.4 System Board Troubleshooting
This section describes how to determine if the system board and CPU are 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: Diagnostic Test Program Execution Check
Procedure 4: Replacement Check
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