I purchased one. The seller removed all of the screws to the internal chassis, only the front cover had screws and shipped it like this. Needless to say, the internal chassis with the power amp module, power supply, transformer etc. all shifted during shipping. The power switch had some kind of extension attached to it to allow the external button to contact and actuate it. That piece is missing and I need to see what it looks like. It doesn't seem to be described or illustrated in the service manual so I'm wondering how that switch interfaces with the front power button/knob.