2 Troubleshooting 2.3 Power Supply Procedure 2 Connection Check
Power is supplied to the system board as illustrated below:
AC
adaptor System board
AC power cord AC adaptor cord
Battery pack
Follow the steps below to check whether each connector has been connected correctly:
Check 1 Make sure the AC adaptor and AC power cord have been firmly plugged into
the DC IN 19V socket and wall outlet, respectively. When they have been
connected correctly, perform Check 2.
Check 2 Connect a new AC adaptor and AC power cord.
• If the DC IN LED does not go on, go to Procedure 3.
• If the battery LED does not go on, perform Check 3.
Check 3 Make sure the battery pack has been correctly installed in the computer. If the
battery LED does not go on while the battery pack has been installed correctly,
go to Procedure 3.
Procedure 3 Replacement Check
The system board, power supply board, or CPU may be faulty. Disassemble the computer
according to Chapter 4 and follow the steps below:
Check 1 Replace the power supply board with a new one. If the battery pack is still not
working properly, perform Check 2.
Check 2 Replace the system board with a new one. If the battery pack is still not
working properly, perform Check 3.
Check 3 Replace the CPU with a new one.
2-8 Satellite A100/A105 / TECRA A7 Maintenance Manual