[2068]
...
Anyway, I turned on the engine and rev'd up to 1400 rpm with 0 boost pressure and took a peak with air cleaner removed and sure enough nothing was spinning. So not sure if it is seized or some other issue so will be doing some research on what to try next (including calling Volvo for tips).
As a first pass, try gently waggling the seized turbo using your fingers or a small spanner with everything turned off.
Don't use too much force, if it's seized hard, it will need a rebuild.