Power Supply Troubleshooting - Toshiba Libretto 50CT User Manual

2.3 Power Supply Troubleshooting

To check the power supply status, install a battery pack and connect an AC adapter.
Check 1 If the DC IN icon flashes orange, go to Procedure 2.
Check 2 If the DC IN icon does not light, go to Procedure 3.
Check 3 If the Battery icon does not light orange or green, go to Procedure 4.
CAUTION: Use only an AC adapter that is manufactured specifically for the Libretto
50CT/70CT. If you use a different AC adapter, the computer's power supply may
malfunction or a fuse on the system board may be blown.
Procedure 2 Error Code Check
If the microprocessor detects a malfunction, the DC IN icon blinks orange. The blink pattern
indicates an error as shown below.
q Start
q Error code (8 bit)
"1"
"0"
Interval between data bits
Error codes begin with the least significant digit. For example:
Error code 12h (Error codes are given in hexadecimal)
Check 1 Convert the DC IN icon blink pattern into the hexadecimal error code and
compare it to the tables below.
q DC power supplied through AC adapter
Error code
01h
2-6
Off for 2 seconds
On for one second
On for half second
Off for half second
Meaning
AC adapter voltage is over the limit (16.5 V)
2 Troubleshooting Procedures
Libretto 50CT/70CT Maintenance Manual