Well - the only remaining DIY advice is to check that the pins connecting the cartridge are clean and that there's nothing somehow shorting between them (and maybe check where the wires are coming out of the tone-arm if that's visible), also that the stylus cantilever is free of anything touching it and isn't bent or whatever. So close.
― attention vampire (MatthewK), Thursday, 11 May 2017 20:54 (seven years ago) link
the photo on the left looks like it has a solid coat of oxidation -- elbow grease, Deoxit, repeat until pristine. Ground screw/horseshoe connect, as well.
― bodacious ignoramus, Wednesday, 17 May 2017 00:23 (seven years ago) link
...and remember, those plugs have two connecting surfaces ea -- outside and center pin.
― bodacious ignoramus, Wednesday, 17 May 2017 00:25 (seven years ago) link