Learn how to perform a BIOS Reset on your Lenovo laptop. This video is also helpful if your replacing your CMOS battery. If you are here because your computer wont turn on, try the following video first; https://youtu.be/axgrpg-xIdE. Then come back here if those tests do not identify the issue.
If this video does not help your computer to start, then next steps would be to test your Power Adapter as seen here; https://youtu.be/YBhsVHideGE and then your Power Jack if the Adapter tests healthy as seen here; https://youtu.be/HpabvrNaodU
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Q: Does this procedure reset your BIOS password?
A: Unfortunately, I dont give advise on bypassing BIOS passwords on this channel.