If you have something else that require
s phantom power (a DI box for instance, or another condenser mic), you should try to use it with your interface to make sure that it's not the audio interface'
s phantom power which has failed you, and can do the same with a dynamic mic to check if the XLR input works. If your cords are new and you can record other instruments with the same equipment, then I think the aforementioned factors seem to be the only other possible problems in your sound chain apart from the mic itself.
If everything else works, did anything happen to the mic? did it take a bad fall or was it submitted to very high/low temperatures or to a very damp environment? Condenser microphones are said to be very fragile as far as I know, so a lot of possible reasons might explain it failing you...
