NBLB2 Service Manual
113
Check 3
Make sure that the DC-IN input port socket is firmly secured to the system board of
the computer.
If the DC-IN input socket is loose, go to Procedure 5.
If it is not loose, go to Check 4.
Check 4
Use a millimeter to make sure that the AC adaptor output voltage is close to 19 V.
If the output is several percent lower than 19 V, go to Check 5.
If the output is close to 19 V, go to Check 6.
Check 5
Connect a new AC adaptor or AC power cord.
If the battery LED does not light, go to Check 6.
Check 6
Make sure the battery pack is installed in the computer correctly.
If the battery is properly installed and the battery LED still does not light, go to
Procedure 4.
3.4 Procedure 4 Diagnostic check
The power supply may not charge the battery pack. Perform the following
procedures:
Reinstall the battery pack.
Attach the AC adaptor and turn on the power. If you cannot turn on the power,
go to Procedure 5.
Run the Diagnostic test following the procedures described Tests and
Diagnostics. If no problem is detected, the battery is functioning normally.
3.5 Procedure 5 Replacement check
The system board may be disconnected or damaged. Disassemble the computer
following the steps described Replacement Procedures. Check the connection
between the AC adaptor and the system board. After checking the connection,
perform Check 1:
Check 1
Use a millimeter to make sure that the fuses on the system board are not blown.
If a fuse is not blown, go to Check 2.
If a fuse is blown, go to Check 3.
Check 2
Make sure that the battery cable is firmly connected to the system board.
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