Appendix B. Troubleshooting - Lenovo ThinkPad 90W Slim AC/DCCombo Adapter User Manual

Appendix B. Troubleshooting

Before contacting Service and Support, complete these steps to verify if your
adapter is defective:
1. Inspect your adapter.
a. Inspect case for any damage (for example, cracks, deformations, or
exposure to water).
b. Inspect cables for any damage (for example, cracks, cut, or exposed
wiring).
c. If any damage is found, discontinue use of the adapter and contact
Service and Support for replacement parts.
2. Ensure all of the connectors are firmly seated at the power receptacle, the
input side of adapter, and the notebook computer.
3. Ensure the adapter has adequate ventilation. The adapter might overheat
and shut down if it is operated too long in a confined area.
4. Check the Power Source.
a. AC Mode: Check the power receptacle by connecting a known working
device (for example, a lamp). If the AC receptacle is not working, verify
that your circuit breaker or fuse panel.
b. Automobile Mode: Check the power receptacle by connecting a known
working device (for example, a mobile phone charger). If the power
receptacle is not working ensure that the key is in the Accessory
position and check the fuse panel.
c. Aircraft Mode: Check if the LED indicator next to the power receptacle
is illuminated. If the LED is not illuminated, contact a flight attendant.
5. Connect the adapter to your notebook computer:
a. If the adapter immediately shuts off, check your notebook computer
connector for looseness or damage. Try connecting the original AC
adapter to your notebook computer. If the original AC adapter operates
correctly, contact Service and Support for a replacement adapter.
b. If the adapter works for a period of time and then shuts off, check to
ensure that the adapter has proper ventilation. It is normal for the
adapter to feel warm when you touch it.
c. If the adapter is used in the Automobile Mode while the engine is off
and the adapter shuts off after a period of time, contact an automotive
and electrical technician to check your vehicle electrical system for
proper output voltage with the adapter and your notebook computer
connected. Some automobile manufacturer designs do not provide
sufficient voltage (minimum 11.5 VDC) to operate the adapter under full
load.
Note: The adapter is designed to shut down and latch off when a fault is
detected. The fault must be removed AND the adapter must be disconnected
for at least 10 seconds before you can reset the adapter.
© Lenovo 2005, 2007. Portions © IBM Corp. 2005.
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