When you said:
Quote Originally Posted by smacky View Post
(no voltage across the fuse using a multimeter)
Did you mean no continuity? No voltage across a live fuse means the fuse has not blown.

Hybrid are the Licensee's of TiVo in Australia, so when you contacted support you spoke with a firm that is contracted by Hybrid to support TiVo.

Sorry Don't know of any members in Sydney who can do repairs, you might want add your location to your profile here. It makes it easier to provide help if you have any location specific issues in the future.

Good luck, let us know how you get on.

Peter.