Toshiba PORTEGE R400 Maintenance Manual page 54

2 Troubleshooting Procedures
Procedure 5 Replacement Check
The system board processor module may be disconnected or damaged. Disassemble the
computer following the steps described in Chapter 4, Replacement Procedures. Check the
connection between the AC adaptor and system board and connection. After checking the
connections, perform the following Check 1:
When AC adapter is connected:
Check 1 AC adapter may be faulty. Replace the AC adapter with a new one. If the problem
still occurs, perform Check 2.
Check 2 System board may be faulty. Replace the system board with a new one.
When AC adapter is not connected:
(When driving with battery pack)
Check 1 Battery pack may be faulty. Replace it with a new one. If the problem still occurs,
perform Check 2.
Check 2 System board may be faulty. Replace it with a new one.
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