JBL SYNTHESIS SDEC-3500P - Loaded with JBL M2 Speaker Tuning Files

Description

I bought this unit used and had it in my stereo system until one day I got no audio output.  I don't know what the problem is or how to fix it.  The unit boots correctly and accepts any program that is loaded.  This unit can be cannibalized for it's operative boards or sent to a BSS Service Center for repair.
Just to be extra clear;  The unit is not operative and is sold for parts or repair only.  This has been relisted due to a non paying purchaser.