I have a yaesu FT-7100 that i picked up off a fellow ham. It was DOA. The seller made it clear in the listing an took the gamble and bought it, figuring it would be a simple fix.
You need to adjust your $$ betting methods on newer DOA radios.
1. Easy fixes for modern radios designed/manufactured over past 15 to 20 years are becoming rare.
Almost all use SMT components and with low failure rates. Just no longer a good bet for buyer.
2. Component level repair by Major retailers and mfg. stopped at end of 20th century (1999/2000).
I watched whole shops of test equipment sold as surplus and techs retired or laid off.
3. Parts obsolescence is a growing problem, especially with Asian mfg.
This is why End of Service occurs as soon after end of production,
as permitted by consumer protection laws of that country.
4. LOOK at eBay in the past 2 years, with their buyer protection.
Sellers are now stripping broken radios down to parts/modules, trying to sell parts for more $$.
I would suggest Yaesu service first.
Check with the eHam.net reviews of 134 repair technicians/service centers.
Some only specialize in specific mfg. or models -- often due to parts availability or their mfg. training.http://www.eham.net/reviews/products/26