Toshiba Satellite C855D - Procedure 2 Connection Check; Procedure 3 Replacement Check

2 Troubleshooting 2.3 Power Supply
2-8 Satellite/Satellite Pro/C850D/C855D/L850D/L855D Maintenance Manual
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 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 LED does not go on while the battery pack has been installed correctly,
go to Procedure 3.
Procedure 3 Replacement Check
The system board or CPU may be faulty. Disassemble the computer according to Chapter 4
and follow the steps below:
Check 1 Replace the system board with a new one. If the battery pack is still not
working properly, perform Check 2.
Check 2 Replace the CPU with a new one.