Hi,
Few questions:
1. What does the battery indicator say when you connect the AC adapter?
2. Have you tried it without the AC adapter connected and what does it say?
Here are some steps you can try that may help.
- Start by uninstalling/reinstalling the ACPI battery driver from Device Manager.
- If that will not work do test the AC adapter first see if it's supplying enough voltage to charge the laptop.
- Another test you may want to try is to use another AC adapter that has the same voltage and see if it will charge the laptop.
- If it will charge using a different charger that means you really need to buy a new charger.