I picked up a Marantz 2270 from a seller on CL yesterday. I asked the seller a bunch of question regarding if the unit had any issue. The seller claimed to be a tech and mentioned that the unit only needed the lamps replaced. This should of been the first red flag (a tech doesn't know how to replace fuse lamps?) The unit seemed to be in decent condition and was an early champagne model,and the price was fairly decent. I'll cut to the point. I got home and connected the receiver to a set of JBL L100's and turned it on. As soon,as I cranked the volume to give the speakers a bit of a punch both channels shut off. I connected some other JBL speakers that I use as testers and the same scenario occurred. I turned up the volume and both channels shut off. The same thing occurred while just using headphones. In order to get the sound back on you have to power off the unit and wait a few seconds and keep the volume low. I opened up the unit,replaced the lamps and sprayed all the switches and pots. The multi path button won't stay depressed,but at the moment thats not my concern. Theres signs that units has been previously worked on. The volume knob feels a bit loose and has a globby soldering job. Also,the power switch was replaced and has an acrylic button. When,i opened up the unit i noticed there was a wire dangling over the muting control amplifier it looks like it should be screwed down to the board. Does anyone have any advice on how to go about repairing this issue?