Model 50HM66. Why is there no sound on channels 6 & 32-1?

SOURCE: My Toshiba 50HM66

i suggest checking the lamp. find you owners manual and go through the steps to "replace the lamp" if it is popped and you can see little pieces moving around inside than contact toshiba and they will send you a replacement with credit card numbers of course.

SOURCE: Toshiba 50hm66 Sound problem on CBS channel only

check any SAP settings in the menu