Power System Checkout; Checking The Lenovo Usb-C 45W Ac Adapter; Checking The Battery And Operational Charging - Lenovo ThinkPad 13 Hardware Maintenance Manual

The following are not covered under warranty:
• LCD panel cracked from the application of excessive force or from being dropped
• Scratched (cosmetic) parts
• Distortion, deformation, or discoloration of the cosmetic parts
• Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force
• Damage caused by liquid spilled into the system
• Damage caused by the improper insertion of a PC card or the installation of an incompatible card
• Fuses blown by attachment of a nonsupported device
• Forgotten computer password (making the computer unusable)
• Sticky keys caused by spilling a liquid onto the keyboard
• Use of an incorrect Lenovo USB-C 45W AC Adapter on laptop products
The following symptoms might indicate damage caused by nonwarranted activities:
• Missing parts might be a symptom of unauthorized service or modification.

Power system checkout

To verify if a battery and a Lenovo USB-C 45W AC Adapter are functional, do the following:
1. Turn off the computer.
2. Connect the Lenovo USB-C 45W AC Adapter.
3. Turn on the computer. If the computer can be turned on, it means that either the battery or the Lenovo
USB-C 45W AC Adapter is functional.
4. Turn off the computer.
5. Disconnect the ac adapter and turn on the computer. If the computer can be turned on, it means the
battery is functional.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
• "Checking the Lenovo USB-C 45W AC Adapter" on page 28
• "Checking the battery and operational charging" on page 28

Checking the Lenovo USB-C 45W AC Adapter

This computer supports only the Lenovo USB-C 45W AC Adapter. When the adapter is connected to the
computer, the output voltage at the adapter plug rises from 0 V (when not connected) to 5 V. Then the
power delivery communication starts. The Lenovo USB-C 45W AC Adapter outputs 20 V according to
the computer output voltage request.
When you use the Lenovo USB-C 45W AC Adapter to charge the computer but no power is charged, see the
instructions in this topic to check the Lenovo USB-C 45W AC Adapter.
Note: Noise from the Lenovo USB-C 45W AC Adapter does not always indicate a defect.
To check the Lenovo USB-C 45W AC Adapter when the computer does not charge, do the following:
1. Disconnect the Lenovo USB-C 45W AC Adapter from the computer.
2. Connect a new Lenovo USB-C 45W AC Adapter to the computer. For information about which Lenovo
USB-C 45W AC Adapter to order, go to http://www.lenovo.com/serviceparts-lookup.
3. If the computer charges, replace the Lenovo USB-C 45W AC Adapter.

Checking the battery and operational charging

Checking the battery
This system 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.
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ThinkPad 13 Hardware Maintenance Manual