I picked it up a few weeks ago, seller said it would only intermittently play in stereo. I figured I would recap it before giving it a try. I replaced all electrolytic caps, the three A726 transistors and the sole VD1212 diode. I cleaned all the switches and pots with deoxit. It plays fine in AM and FM mono. FM stereo is dead silent. Any ideas? Lokks like no one had ever been inside the unit. I'm guessing the lights are original, so I ordered replacements,