What is the model number of the turntable? If you are sure the problem is not the pre-amp or the amplifier then I would say it's the cartridge (I believe the needle is part of the unit). It has been so long..I am not sure now.
Ok folks, dont laugh. Vinyl is still a Cottage Industry even after CD's becoming obsolete. Im trying to diagnose a problem with my old Gerrard Semi-Automatic Turntable. I assume its the needle but am not sure. Replacing it might cost more than a decent MP3 player today.
The problem is that I have to turn the volume sky-hi just to get anything out of one channel only (no stereo.) I verified all four connecting wires from the needle to the RCA jacks are solid. This model takes the "receiver-type" needle that it attached to a little plastic "receiver" bay that slides up into the rectangular-metal box (instead of the "stand-alone" needle type.)
So would it be the needle or the metal box, or something else.