Checkout Guide; Power System Checkout; Checking The Built-In Battery And Operational Charging - Lenovo ThinkPad 10 Hardware Maintenance Manual

• 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 tablet
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.

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
for other systems. If an unauthorized battery or a battery designed for another systems is installed, the
system will not charge.
Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
The battery status icon in the Windows
power.
To check for detailed battery status information, open the Lenovo Settings program and tap Power.
To check whether the battery charges properly during operation, do the following:
1. Ensure that the tablet failure is not caused by exhausted battery power.
2. Reset the tablet by inserting a straightened paper clip into the emergency reset hole. Then press the
power button. If the tablet cannot be turned on, continue with the next step.
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Hardware Maintenance Manual
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notification area displays the percentage of the remaining battery