Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz Maintenance Manual page 68

2 Troubleshooting Procedures
Procedure 5 Replacement Check
The system board or the battery board 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 the system board and connection between the system
board and the battery board. After checking the connection, perform the following Check 1:
Check 1 Replace the AC adaptor with a new one. If the AC adaptor is still not functioning
properly, perform Check 2.
Check 2 Use a multimeter to make sure that F5602, F5603 and F8800 fuses on the system
board are not blown. If a fuse(s) is not blown, go to Check 3. If a fuse(s) is blown, go
to Check 4.
Check 3 Use a multimeter to make sure that F8810 fuse on the battery board are not blown. If
the fuse is not blown, go to Check 4. If the fuse is blown, replace the battery board
with a new one following the instructions in Chapter 4.
Check 4 The battery board or system board may be damaged. Replace it with a new one
following the instructions in Chapter 4.
2-18
2.3 Power Supply Troubleshooting
Satellite A20 Maintenance Manual (960-444)