Hi,
I'm sure I don't need to tell you, but the turbo producing no boost and you not feeling any are two very different things.
If you can hear the 'whoosing noise' that you normally hear when backing off the throttle or changing gear, the chances are that your turbo is still producing boost, but you have a boost leak.
If you feel absolutely no boost what-so-ever, its likely to be a stuck wastegate (in the open position) which means you're constantly venting boost to atmosphere, rather than only on throttle lift.
It may even just be the wastegate actuator which has failed, in which case your repairs aren't going to cost you a fortune! (Good news at last!)
Fingers crossed buddy.
