This is NOT a "tv repair shop", BUT it IS a place where one can go and get many parts to work on them, which are not available at radio shack. He also has a lot of "vintage parts" still around too.
http://stclairelectronics.com/
I have been going there off and on for over 20 years now. If you go inside--it is a "throwback" to what a tv parts store must have looked like maybe in 1974 or so !! But he increasingly carrying parts for modern flat-panel sets.
He is the ONLY place around here anymore--to get this stuff, aside from MCM in springboro. There used to be a LOT of parts places in CINcy and dayton area...but NO MORE.