Anyone know where to repair mingdac mc3008c amp?

Amp has trouble when first power popping sound coming out of speaker, front meter has gone up little and stay. Pacific value gone out business. If anyone know where better of service Mingdac product Please Help!!!!
Can you specify your location or you're willing to ship to the end of world?
My location has few great and knowledgable techies that do perfect job on tube electronics.
Same here. I have a couple of techs that have worked on various Chi-Fi equipment that could help. Depending on where you are shipping from they might be able to do the work on your MingDa gear.