I bought a used Technics SL-1200 MK2, with broken output wires. I replaced the wires with new single conductor shielded cable similar to the original wire. I was unable to test my soldering job then, but I recently purchased a phono preamp used and when I tried it, very little sound came out and at listening volume, the hum and noise from the preamp was very loud. Also, the channel imbalance was toward the left; with the left channel almost completely gone.
So, there are a few possible causes for this problem.
My cartridge could be bad. I got this cartridge from the same guy whom I bought the turntable from; it's a Ortofon Concorde.
The tonearm could be bad. Maybe the wires could have corroded or something.
My soldering job could be bad. I hope that I'm not that incompetent.
The preamp could be bad. It's a Audio Technica AT-PEQ3, lightly used.
Any help would be appreciated.