The table came with a Shure 93E ellipitical cartridge. Fantastic sound before I fiddled with the broken speed control. I have it hooked up to the phono input on my Harmon Kardon HK505 amp. Chasing the wrong problem I think. What else could cause no signal from the cartridge? I will do a continuity test on the 4 wires from the cartridge to the RCA port. Not sure what else to try.
First, don't test for continuity with the cartridge connected, especially if you only have an analog meter.
Second, you can test for continuity without a meter- set the input to Phono, turn the volume control to the lowest position and touch the tip of the red and white wires, separately at the underside (your photo of the wires inside show the RCA tips- touch them with your finger). If you hear hum when you touch the tips but nothing when the record plays, the cartridge has a problem. If you hear hum when you touch one tip but not the other, unplug the cables and reinsert the plugs- it could help. If you have sound from both channels, move to the cartridge end and while holding a straightened paperclip or other piece of wire, touch the clip on the red and white wires, one at a time. If you hear hum, the wires aren't the problem.
I don't remember exactly how, but the headshell should slide out from the end of the tonearm. Remove the stylus before starting, but once the headshell has been removed, look at the contacts at the rear end- if they're black and discolored, you can use a pencil eraser to burnish them and remove oxidation. You'll want to do the same to the contacts on the tonearm.
These contacts were usually silver and that tarnishes very easily. If it's oxidized, the sound can be interrupted.
You can test for hum before and after cleaning the contacts by repeating the second test by touching the red and white wires and clips.
Remember, don't turn the volume control up more than needed to hear a bit of hum.
If you turn the volume control up without playing an LP and you hear hum from one channel, it leans that a + wire isn't connected to the cartridge or anything else.