Lenovo ThinkPad Tablet 2 - Manual (Page 30)

• 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.
Power system checkout
To verify a symptom, do the following:
1. Turn off the tablet.
2. Remove the built-in battery.
3. Attach the tablet to a ThinkPad Tablet Dock (hereafter referred to as the dock) and then connect the
dock to an electrical outlet using the 65 W ac power adapter shipped with the dock.
4. Check whether power is supplied when you turn on the tablet.
5. Turn off the tablet.
6. Disconnect the ac power adapter and detach the dock. Then install the built-in battery.
7. Check whether the built-in battery supplies power when you turn on the tablet.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
Checking the built-in battery
When you use the built-in battery but the tablet fails, see the instructions in this topic to check the built-in
battery.
To check the built-in battery, do the following:
1. Turn off the tablet.
2. Replace the built-in battery with another battery.
3. Check that power is supplied when you turn on the tablet.
If you can turn on the tablet, replace the built-in battery.
Checking the built-in battery status
To check for the accurate status and adjust your tablet power settings to achieve the best balance between
performance and power saving, do the following:
1. From the Start screen, tap Lenovo Settings ➙ Battery.
2. Check your battery status and configure settings.
To check the battery status in Lenovo Support, do the following:
1. From the Start screen, tap Lenovo Support ➙ Battery Health.
2. Check your battery status and configure settings.
Checking the ThinkPad Tablet AC Adapter
When you use the ThinkPad Tablet AC Adapter to charge the tablet but no power is charged, see the
instructions in this topic to check the ThinkPad Tablet AC Adapter.
To check the ThinkPad Tablet AC Adapter, do the following:
1. Disconnect the power cord from the tablet.
2. Measure the output voltage at the plug of the power cord. Refer to the following illustration:
24 Hardware Maintenance Manual