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.
Free, abundant OTA television separates this country from many others. ATSC1 has only been in force since 2009. The wireless industry has enough spectrum. Enough of 'planned obsolesce'.