Strange Shruthi problem

I wonder if anyone can help with a problem I have. I’ve got 2 Shruthi’s both seem to work but on one the presets only go up to 80, and 17-80 are blank. The other one goes up to 280. Thinking it was the CPU or EEprom I swapped them over but the fault remained so it must be the board I,ve since swapped all the chips between them so I can only conclude its a fault somewhere on the PCB. Oh and if I try to sysex the presets to it it crashes.?