Prince 7000 stringer repair needed

Would anyone know of a qualified repair person in the Dallas area? My Prince 7000 is having trouble powering up (takes several attempts to turn it on, and I think it’s a matter of time until it doesn’t).
I have not been successful in the past when I’ve tried to contact Prince, including the rep who sold me the machine, so I’m not hopeful that they will get back to me this time. Appreciate any ideas.