Sony TA-N80ES repair

I have this amp. It has been recapped. I have the correct transistors, all new, they need to be installed. Also, there appears to be an issue with the balanced line where I connect the XLRs from a preamp and I only get one channel of no channels. Until recently I was getting both channels on the unbalanced lines and yesterday I lost the right channel. It sounds amazing otherwise. I would like to get this fixed up right. 

Can someone recommend a person to do this work. I am near Rochester NY but am willing to send it away to be fixed/rebuilt. All caps are essentially new. There are less than 15 hours on them.

TIA