Doug,
Toshiba replaced part of my audio circuit for the same set when it was
under warranty.
The tech did note that there was a design flaw that Toshiba was aware of
and that it had to do with some of the wiring being to close to the (a)
highvoltage part of the set.
They replaced the part(s) and re-routed the affected wiring.
Cheers Dave

Toshiba TV audio distortion
 

Doug,
Toshiba replaced part of my audio circuit for the same set when it was
under warranty.
The tech did note that there was a design flaw that Toshiba was aware of
and that it had to do with some of the wiring being to close to the (a)
highvoltage part of the set.
They replaced the part(s) and re-routed the affected wiring.
Cheers Dave