If your turntable is only playing sound from one speaker, there could be several possible reasons for this issue:
Incorrect connection: Check the wiring and connections between your turntable and your audio system. Ensure that the cables are securely plugged into the correct audio outputs and inputs. Make sure that the left and right channel cables are connected properly.
Faulty cable or connection: The issue might be with the cables themselves. Inspect the cables for any signs of damage, such as frayed wires or loose connections. Consider trying a different set of cables to see if the problem persists.
Turntable settings: Some turntables have built-in settings or switches that control the audio output. Check if there are any settings related to the audio balance or channel output. Ensure that these settings are adjusted correctly for stereo playback.
Cartridge or stylus issue: The cartridge or stylus on your turntable may be faulty or misaligned. If the stylus is not making proper contact with the record grooves, it can result in sound only coming from one speaker. Consider checking the condition of the stylus and cartridge and, if necessary, replace them or have them professionally aligned.
Phono preamp issue: If your turntable requires a separate phono preamp to connect to your audio system, there might be an issue with the preamp. Try connecting the turntable directly to different inputs on your audio system to rule out any issues with the phono preamp.
Amplifier or receiver issue: There could be a problem with your amplifier or receiver that is causing sound to come from only one speaker. Try connecting a different audio source to the amplifier/receiver to see if the problem persists. If the issue is present with other audio sources as well, it indicates a problem with the amplifier or receiver.
If you have checked these possibilities and the issue persists, it may be worth consulting a professional audio technician or contacting the manufacturer for further assistance.