Power Problems; A Power Key Problem; Sleep Problems - Lenovo ThinkPad 13 User Manual

Solution: The surge protector in the built-in battery might be active. Turn off the computer for one minute
to reset the protector; then turn on the computer again.
• Problem: The built-in battery cannot be charged.
You cannot charge the battery when it is too hot. Turn off the computer and allow it to cool to room
temperature. After the computer cools, recharge the battery. If the battery still cannot be charged,
have your computer serviced.

Power problems

Print these instructions now and keep it with your computer for reference later.
If your computer is getting no power at all, check the following items:
1. Check all power connections. Remove any power strips and surge protectors to connect the Lenovo
USB-C 45W AC Adapter directly to the ac power outlet.
2. Inspect the Lenovo USB-C 45W AC Adapter. Check for any physical damage, and make sure that the
power connector is firmly attached to the USB-C connector on the computer.
3. Verify the ac power source is working by attaching another device to the outlet.
4. Remove all devices and then test for system power with minimal devices attached.
If your computer does not run on battery power, check the following items:
1. If the battery runs out of power, attach the Lenovo USB-C 45W AC Adapter to recharge the battery.
2. If the battery is charged but the computer does not run, call Lenovo Customer Service Center to have
it serviced.

A power key problem

Problem: The system does not respond, and you cannot turn off the computer.
Solution: Turn off the computer by pressing and holding the power key for eight seconds or more. If the
system is still not reset, remove the Lenovo USB-C 45W AC Adapter.

Sleep problems

• Problem: The computer enters sleep mode unexpectedly.
Solution: If the microprocessor overheats, the computer automatically enters sleep mode to allow the
computer to cool and to protect the microprocessor and other internal components. Check the settings
for sleep mode.
• Problem: The computer enters sleep mode immediately after the power-on self-test.
Solution: Make sure that:
– The battery is charged.
– The operating temperature is within the acceptable range. Refer to "Computer specifications" on
page 8.
If the battery is charged and the temperature is within range, have the computer serviced.
• Problem: A critical low-battery error occurs, and the computer immediately turns off.
Solution: The battery power is getting low. Connect the Lenovo USB-C 45W AC Adapter to the computer
and to an electrical outlet.
• Problem: The computer does not return from sleep mode, and the computer does not work.
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ThinkPad 13 User Guide