See what a non-working set goes for on Ebay. Just a few months ago I was at an ecycle center and saw many flat screens from small to a few 65 inch models that were being left there. Those essential were going for zero dollars. So a pretty huge non-working 65 inch Samsung was there for the taking (not a cracked screen no less) for zero dollars.
I fear that dead TVs have a negative value today.
I had an LG TV that I took to a local repair shop with a broken capacitor. Essentially, the repair man never followed up in a reasonable amount of time with a estimate for repair, despite an $80 diagnostic fee.
After chasing him down via phone for weeks he finally says he has to order a part, but still hasn't quoted me a cost for repair. Now he wants $300 for the TV.
Needless to say, I'll be taking this clown to small claims court but I need to know a reasonable value for the broken television, if sold for parts.