[cpaace]

I have the Y62. All of a sudden I cannot play the lower register except, possibly for lower B and C. The rest plays in the higher octave. With a great deal of effort I can get the D thru g to play, but not above and even then I get a gurggle. I cannot see any issues with any of the pads or keys. I had played the tenor just the previous day and not even a hint of a problem.

 

[1saxman]

Something happened to cause a leak.

 

[littlewailer]

The only answer is to take it to a shop. It might even be as simple as one of the adjustment screws coming out of alignment. But you might possibly make things worse if it's not that.

Take it in. Get it fixed.

 

[Dr G]

+3 to see a tech.

FWIW, one of the most frequent leaks is from the octave key on the neck getting bent when you assemble the horn. Check to see that that octave key pad is seating when the horn is assembled with the neck secured in playing position.