Procedure 3 Connection Check; Procedure 4 Charging Check; Charging Check; Procedure 4 - Toshiba Satellite U400 Maintenance Manual

Procedure 3 Connection Check

The wiring diagram related to the power supply is shown below:
Any of the connectors may be disconnected. Perform Check 1.
Check 1 Make sure the AC adapter and the AC power cord is firmly plugged into the DC
IN connector PCN1 and wall outlet. If these cables are connected firmly, go to
Check 2.
Check 2 Replace the AC adapter and the AC power cord with new ones.
• If the DC IN icon does not light, go to Procedure 5.
• If the battery icon does not light, go to Check 3.
Check 3 Make sure the battery pack is installed in the computer correctly. If the battery is
properly installed and the battery icon still does not light, go to Procedure 4.

Procedure 4

Charging Check

Check if the power supply controller charges the battery pack properly. Perform the
following procedures:
Check 1 Make sure the AC adapter is firmly plugged into the DC IN socket
Check 2 Make sure the battery pack is properly installed. If it is properly installed, go to
Check 3.
Check 3 The battery pack may be completely discharged. Wait a few minutes to charge the
battery pack while connecting the battery pack and the AC adapter. If the battery
pack is still not charged, go to Check 4.
Check 4 The battery's temperature is too high or low. Leave the battery for a while to
adjust it in the right temperature. If the battery pack is still not charged, go to
Check 5.
2-10 Satellite U400/Satellite Pro U400/PORTEGE M800 Maintenance Manual
Chapter2 Troubleshooting Procedures
(W8800).