Checking The Ac Power Adapter; Checking The Built-In Battery And Operational Charging; Checking The Coin-Cell Battery - Lenovo ThinkPad S2 Yoga Gen 7 Hardware Maintenance Manual

Checking the ac power adapter

If the computer fails only when the ac power adapter is used:
• If the power problem occurs only when the docking station or the port replicator is used, replace the
docking station or the port replicator.
• If the system status indicator does not blink three times when an ac power source is connected, check the
power cord of the ac power adapter for correct continuity and installation.
• If the computer does not charge during operation, go to "Checking the built-in battery and operational
charging" on page 27.
Note: Noise from the ac power adapter does not always indicate a defect.
Checking the ac power adapter
1. Connect the computer to a power outlet and turn on the computer.
2. Start the Vantage app, and then click Hardware Settings ➙ Power. The ac power adapter information
is displayed.
Ensure that you use the ac power adapter that is shipped with the computer to provide enough power to the
computer. Otherwise, a message will be displayed, prompting you that the computer will not be charged or
will be charged slowly.

Checking the built-in battery and operational charging

This system supports only batteries specially designed for this specific system and manufactured by Lenovo
or an authorized manufacturer. 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.
Move your pointer to the battery-status icon in the Windows notification area to check the battery status. The
battery-status icon displays the percentage of battery power remaining and how long you can use your
computer before you must charge the battery.
To check whether the battery charges properly during operation, do the following:
1. Discharge the battery to 50% or lower.
2. Connect the computer to ac power to charge the battery. If the battery status icon in the Windows
notification area indicates that the battery is not charging, remove the battery and let it return to room
temperature.
3. Reinstall the battery. If the battery is still not charging, replace the battery.
4. Check the battery status icon again. If the same error still exists, replace the system board.

Checking the coin-cell battery

Do the following:
1. Power off the computer, and unplug the ac power adapter from it.
2. Turn the computer upside down.
3. Remove the built-in battery (see "Disabling the built-in battery" on page 65).
4. Remove the coin-cell battery (see "1110 Coin-cell battery" on page 77).
5. Measure the voltage of the battery. See the following figure.
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Chapter 3 General checkout
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