System Board; Procedure 2 Connection Check - Toshiba Satellite L300D Maintenance Manual

2 Troubleshooting

Procedure 2 Connection Check

Power is supplied to the system board as illustrated below:
AC power cord
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 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.
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 L300D/L305D/Satellite Pro L300D/EQUIUM L300D/SATEGO L300D
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AC
adaptor
AC adaptor 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.
2.3 Power Supply

System board

Battery pack
Maintenance Manual