Boss DD-3 Digital Delay in need of repair

This is a BOSS DD-3 Digital Delay pedal not fully operational. The HOLD (sample) function works but the other functions do not. I bought this in Mannys New York in the late 80s and it has worked perfectly until recently. The delay function stopped working but the led lights and the HOLD function works no problem. It could be a broken wire or solder joint. Not sure what it is worth now so I am open to offers. I can ship anywhere in Ireland for €6. Let me know if you have any questions. Thank you.