Needing tech who can diagnose and repair Denon
I have a Denon AVP A1HDCI preamp. I live inBend Oregon and have a problem. When I first power up the unit and cold the volume is very faint and has no low end. I have tried other amplifiers on the output and other audio sources. I have diagnosed it to be with this component. After have power for a hour or more, the level starts increasing and I can dial the volume down. No fuses are blown or any visible signs. I am looking for a tech who can work on this unit or for a service manual. I am a electrical engineer and have access to a digital 4 channel scope. Please message me if you can help me out.