ac brick on comp is hot and smells like burnt plastic

First of all my comp says 63%, not charging and it is plugged in. I have checked my drivers and updated them under device manager, batteries and then rebooted. Nothing happened and the ac brick is hot and smells a bit. What could be wrong? I cleaned out the vents and the fans are not running o much anymore but when I checked the battery setting it said 100%, charged.
Wjat can be wrong, and what should I do? It is obviously working (power cord) but the laptop powers off if I unplug it. Any ideas? Is it the cord or battery anyways? Please help. Thanks!:??:
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More about brick comp hot smells burnt plastic
  1. Hello... Can you boot from just the battery installed from the Computer? How old is the battery? Batteries do get old and will not charge... or cause overheating of the PS/charger.
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