2 Troubleshooting Procedures 2.4 System Board Troubleshooting
2-16 PORTEGE A100 Maintenance Manual (960-460)
2.4 System Board Troubleshooting This section describes how to determine if the system board is defective. 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: Debug port (D port) Check on Boot Mode
Procedure 3: Diagnostic Test Program Execution Check
Procedure 4: Replacement Check