Tube amp repair shop in/near NYC?

I think my tube amp has a defective bias supply as the output tube plate structure glowed ever brighter, the bias led came on and then the rail fuse blew. Trying another tube yield the same symptom (I turned the amp off when the bias led came on).

It may have been caused by shorting the speaker outputs when I was rearranging cables behind the amp and forgot to turn it off.