Toshiba T2100 Series Maintenance Manual page 28

Procedure 1 AC IN LED Indicator Check
The T2100 Series computer's AC Power Supply (PS) unit converts AC power to DC power
and contains a charging circuit which charges the computer's batteries. The AC power cord
connects to the AC IN socket connector on the back of the computer. When the AC power
cord is connected and the power is turned off, the AC charges the batteries.
The AC IN indicator displays whether or not the AC power cord is connected and supplying
power.
When the AC IN indicator is green, the AC power cord is connected and supplying
power to the T2100/T2105 Series computer.
If the AC IN indicator does not light, the AC power cord is not supplying power to
the computer or the AC power cord is not attached to the computer, go to Check 1.
If the AC IN indicator is flashing orange, the AC power cord's voltage supply is
abnormal or the power supply is not functioning properly, go to Check 1.
If any of the above indicator conditions are abnormal, make sure the LED indicator lights are
not burned out before performing the following Checks as indicated.
Check 1 Make sure the correct AC power cord is firmly plugged into the AC IN socket on
the back of the computer.
Check 2 If the AC IN indicator flashes orange when the AC power cord is connected,
output voltage is abnormal. Connect a new AC power cord and turn the computer
on again to verify the indicator condition.
Check 3 The battery pack may be malfunctioning. Replace the battery pack with a new one
and turn the computer on again. If the problem still exists, perform Check 4.
Check 4 Place the computer in an environment between –20°C and 70°C until the computer
is at the ambient temperature. Repeat the steps which caused the computer to
operate abnormally. If the same problem still appears, perform Procedure 2.
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T2100 Series