built a green russian clone using the big muff’n pcb sold on this site. when i plug it in, the led lights up so there’s power but theres no signal coming from my guitar and into my amp when i plug it in. i tested a boss rc1 looper with the same cables + psu and it worked fine. the most i get out of it is some crackling when i mess w/ the pots but theres no output even when i crank my amp up to the max. i lined the enclosure with electrical tape to ensure there arent any shorts and cleared the pcb of any stray contacts so im completely stumped

please help! thank you
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