Oh yeah....and your tach isn't off.....it's also controlled by the ECU remember? The tach and boost gauge gets it's input from the ECU.
And a whining turbo isn't necc. a sign that it is dying. Go here and do these checks. May save you a few hundred dollars or more.
http://turbotech.com.au/trouble.htm Be sure to also check the links on the side bar.
Wiz