My MacBook Air's fan is buzzing like crazy and it won't accept charge. System Preferences says I don't have any battery percentage but my computer is still on and working. What do I do?!

Please help!

Execute a SMC reset:
http://support.apple.com/kb/ht3964
If no success open System Information (Profiler)>Power and post the following.  Make certain that the charger is attached:
Run an Apple Hardware Test:
http://support.apple.com/kb/ht1509
It would be helpful if you indicated the exact model MBA you have.
Ciao.

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