Parasound amp and pre amp issue: repaired but not repaired
I took my Parasound HCA 1500A amp and P/LD 1500 pre to get repaired 3 weeks ago. This morning I drove to Syracuse (2 1/2 hours away) in a snowstorm and picked them up. The pre amp had a power supply rebuild and a few other tweaks (a few caps or resistors changed as well) and the amp just had some servicing and cleaning and making sure everything in spec. I hooked everything up about an hour ago and there are still issues. Before there was no sound when I hooked everything up. Now there is sound but the sound of one speaker is noticeably lower in volume than the other speaker. I switched the speaker wires on the back of the amp and the problem has now gone to the other speaker (and the sound of the speaker whch initially had the problem is fine). Any thoughts on what it is? A bad channel in amp? Unbelievable!! $600 in repairs later and now I have to take everything back again to get fixed (again). Doesn't anyone know how to fix vintage equipment correctly anymore? I had heard good things about this tech but it seems like he did not get it right. Is there any risk to my equipment if I play the amp and pre amp like this until I can take the equipment back next weekend. It is the only system I currently have and I'd like to listen to some musc this week even if the sound is off on one speaker. Thanks.