There is a "white dots" thread. $250 fro a repair is cheap. He is certainly NOT "ripping you " off. Almost no one does component repair, it's just board swaps. The time it tkaes to rework small components (other than caps for example) and the equipment needed isn't worth the labor time. labor rates aren't what they are in China.
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.