Table 2-2 Dc-In Led - Toshiba Satellite U900 Maintenance Manual

2 Troubleshooting Procedures
AC-IN LED
Solid on
Off
To check the power supply status, install a battery pack and connect an AC adaptor to the
DC-IN port on the computer and to a power supply.
If the DC-IN LED or Battery LED is not lit, go to Procedure 2.
Procedure 2 Adaptor / battery replacement
A faulty adaptor may not supply power or may not charge the battery. Perform Check 1.
Check 1 Connect a new AC adaptor. If the problem is not resolved, go to Check 2.
Check 2 Insert a new battery. If the problem is still not resolved, go to Procedure 3.
Procedure 3 Power supply connection check
The power supply wiring diagram is shown below:
AC power cord
AC
adaptor
Any of the connectors may be disconnected. Perform Check 1.
Check 1 Disconnect the AC power cord from wall outlet. Check the power cable for
breaks. If the power cord is damaged, connect a new AC power cord. If there is
no damage, go to Check 2.
Check 2 Make sure the AC adaptor cord and AC power cord are firmly plugged into the
DC-IN socket, AC adaptor inlet and wall outlet. If these cables are connected
correctly, go to Check 3.
Satellite U900/U940/U945 Series Maintenance Manual

Table 2-2 DC-IN LED

Power supply status
AC power exists (LED is solid White).
No AC power exists.
AC adaptor cord
System
board
Battery
11