Can I put a LED tube in a high frequency ballast fixture without removing the ballast?
The packaging of your LED tube should specifically state whether or not it is supposed to use a ballast. If you connected a no-ballast tube to a ballasted socket, yes, it is possible that you fried the circuits.

See also the answer to https://electronics.stackexchange.com/questions/95491/is-it-more-energy-efficient-to-remove-the-ballast-by-using-led-tube