I was given a Razor E300 and was told that the only thing wrong with it was it needed a new charger. Well, I got the charger and it states the razor is charged but the razor still doesn't work. Any suggestions on what else could be wrong with it?

You have to make sure that the batteries are still good.
Take a volt meter and read the levels that the batteries are producing. If the levels are too low, then your batteries may have sat, unused, for too long. SLA (Sealed Lead Acid) batteries will generally lose their charge holding capabilities if you leave them in storage for too long without charging them.

YOu can get replacement batteries at this online Electric Scooter Parts Store:
http://www.partsforscooters.com/s.nl?partner=URBANSCOOTERS

-Jackson
http://urbanscooters.com/

Dead battery.