Last suggestion. Don't know where you live. But you may get a speedier and less expensive turn-a-round of you deal with an ARC Service Center tech. You can call ARC and ask where the nearest authorized tech is located. If not too far away, shipping might even be a little cheaper. If this makes sense, call Kal or Chris at ARC and I'm sure they will send you to the right place.
P.S. I live in the Philly area. There's a tech near me who makes house calls. Believe me ... when he comes over to check this or that with my amp, it saves me a heck of a lot of schlepping a 75+ pound monster up a flight of steps, packing it in a 15 pound box and then taking it to FedEx.
P.S. I live in the Philly area. There's a tech near me who makes house calls. Believe me ... when he comes over to check this or that with my amp, it saves me a heck of a lot of schlepping a 75+ pound monster up a flight of steps, packing it in a 15 pound box and then taking it to FedEx.