I have this old Digitech RP255 multi effects professor that isn't producing any sound. I bypassed the 2.5mm barrel jack since I only had 2.1 and it powers on but no sound
Amazon.com: HQRP AC Adapter Compatible with Digitech PS0913B RP200A RP250 RP255 RP350 RP300A RP355 RPx400 RP1000 RP100 RP100A RP150 RP155 VL4 BP200 BP355 Power Supply Cord Transformer : Electronics
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