Look for a thread on your model series (here or at the site in my 4th post) and see if anyone else posted something about your situation.
Get the Service Manual.
I'm not familiar with what is being done with the replacement/rebuilt modules. There might be another jobber that is rebuilding them.
Abundant OTA television is what makes this country different from all others. Lets keep it this way. If you like Wi-Fi so much, OTA fits right in. After all, it is wireless.