Laptop dead after plugged in, not charging message. How do I get it back on?

After a major system update, my Windows laptop started saying "plugged in, not charging". It would maintain its battery level as long as it was plugged in, but would never charge higher. I was too busy to worry about it, and it ended up draining one day while not plugged in. Now it won't charge. It won't come on with a new charger, nor when I take the battery out, nor with a new battery. No charge, and no power. This laptop is relatively new, and has always worked well and faithfully. It's a Lenovo IdeaPad. Surely there's an answer to this besides "get a new laptop". So many important documents are on here. What do I do now?

You can contact Lenovo for the customer support you already paid for.
Might have warranty coverage.
That is all that can be guessed from only "Lenovo Ideapad" and no details.

You probably don't need a new computer, most likely a new battery, small possibility a new AC adapter.

Are you SURE you installed the new battery correctly? That SHOULD fix your problem.

A laptop is designed to NOT turn on if the battery is discharged. Most will not power up on the charger alone.
This is because the charging system is not strong enough to do both. Another characteristic is that many batteries will stop charging beyond a certain capacity(memory-so to speak) if never allowed to discharge fully on occasion.
My laptop will not power even with the adapter plugged in if the battery is too low. The fix is to plug in the charger and leave it overnight. It will then power up. To sort things out, inspect the power jack and jack plug for damage. They should fit together snugly. Next, verify that the charger is properly plugged into a working AC outlet. The unit may be able to detect when the adapter is plugged in due to the fact that contacts are transferred in the power jack. You would get the message you see if the adapter is plugged into a bad AC outlet. My adapter has a green light that tells me it is itself plugged into a good power source.
The problem you describe matches up to that of a bad AC power source.

Disconnect AC
>Shutdown
>Remove battery
>Connect AC
>Startup
>In Device Manager, Under the Batteries category, right-click all of the Microsoft ACPI Compliant Control Method Battery listings, and select Uninstall (it's ok if you only have 1).
>Shutdown
>Disconnect AC
>Insert battery
>Connect AC
>Startup

See how that goes, you can find other methods to solve this problem.
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