You didn't state if you purchased this used or new. If used, maybe the tonearm or the rca cables are bad. Or, if you set it up inccorectly.
Just to be sure...
TURNTABLE -> MIXER PHONO INPUT (CH1 or CH2) -> OUTPUT MIXER (MAIN OUT) -> STEREO INPUT (AUX IN or LINE IN).
Make sure you have the line selected properly on your receiver, and if you have a tape function, press the button in and out. Sometimes this will affect the sound. Now, check to see if your getting any signal to your mixer. Make sure the toggle switch on your mixer is set for PHONO and not LINE. Raise all volumes, including heapdhone, and see if you hear or see anything on the levels.
If all is good, but no signal going to mixer, then you might have a bad tonearm or RCA cables....
To check, disconnect the cartridge/headshell from your tonearm. Look inside the tonearm, and you'll see 4 gold plated prongs. Make sure they are all evenly protruding. Also make sure they are all a shiny. If you see any black substance on any of the prongs, they need to be cleaned. If any look like they are stuck, and not sticking out like the other ones, this would also cause an issue. This cannot be repaired. You can try to get the prong to come out, but if it does not work, you will have to replace the tonearm.
If everything with the tonearm looks good, then the issue might be the RCA cables. There is no easy way to check this, other than opening up the turntable. This is not easy, and I do not recommend.
Let me know how it turns out.
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