Lenovo ThinkPad 8 - Manual (Page 30)

• Forgotten tablet password (making the tablet unusable)
• Sticky keys caused by spilling a liquid
• Damage caused due to use of an incorrect ac adapter
The following symptom might indicate damage caused by nonwarranted activities:
• Missing parts might be a symptom of unauthorized service or modification.
Checkout guide
Use the following procedures as a guide in identifying and correcting problems with the ThinkPad notebook
computers.
Note: The diagnostic tests are intended to test only ThinkPad products. The use of non-ThinkPad products,
prototype cards, or modified options can lead to false indications of errors and invalid system responses.
1. Identify the failing symptoms in as much detail as possible.
2. Verify the symptoms. Try to re-create the failure by running the diagnostic test or by repeating the
operation.
Lenovo Solution Center
The Lenovo Solution Center program enables you to troubleshoot and resolve computer problems. It
combines diagnostic tests, system information collection, security status, and support information, along
with hints and tips for maximum system performance.
The Lenovo Solution Center program is available for download at http://www.lenovo.com/diags.
To run the Lenovo Solution Center program, go to Control Panel and click System and Security ➙ Lenovo -
System Health and Diagnostics, and then follow the instructions on the screen.
For more information about the Lenovo Solution Center program, refer to the help information system
of the program.
Power system checkout
To verify a symptom, do the following:
1. Turn off the tablet.
2. Connect the ac power adapter.
3. Turn on the computer. If the computer can be turned on, it means that either the battery or the ac
power adapter is functional.
4. Insert a straightened paper clip into the emergency reset hole to reset the computer. If the computer is
still powered on, it means that the ac power adapter is functional.
5. Turn off the tablet.
6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it
means that the battery is functional.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
• “Checking the built-in battery and operational charging” on page 24
• “Checking the ac power adapter” on page 25
Checking the built-in battery and operational charging
This computer supports only batteries specially designed for this specific system and manufactured by
Lenovo or an authorized builder. The system does not support unauthorized batteries or batteries designed
24 Hardware Maintenance Manual