Checking The Built-In Battery And Operational Charging; Checking The Coin-Cell Battery - Lenovo ThinkPad P15v Gen 2 Hardware Maintenance Manual

2. Measure the output voltage at the plug of the ac power adapter cable. See the following illustration:
3
2
1
Note: Output voltage of pin 2 of the ac power adapter might differ from the one you are servicing.
3. If the voltage is not correct, replace the ac power adapter.
4. If the voltage is acceptable, replace the system board.
Note: Noise from the ac power adapter does not always indicate a defect.
If the computer does not charge during operation, go to "Checking the built-in battery and operational
charging" on page 29.

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.
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 until the remained battery power is less than 50%.
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 "1100 Built-in battery" on page 71).
4. Remove the coin-cell battery (see "1040 Coin-cell battery" on page 66).
5. Measure the voltage of the battery. See the following figure.
(20V)
Pin Voltage (V dc)
1 +20
2 0
3
Ground
.
Chapter 3 General checkout
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