We have started to see an increase in Lenovo Laptops with various power issues, such as
Charging while off but not powered on.
Intermittent charging.
Will not charge once the battery completely discharges.
These are just a few examples.
The first troubleshooting step should be the following.
Power down the computer completely.
Remove the power plug from the computer.
Hold the power button for 30 full seconds.
Plugin the power supply and verify that it is charging.
Please turn on the computer and verify that it is still charging.
These steps have remedied most of the charging issues that we have seen.