Hi guys i sold my amp(spider v240) and mkll shortboard and the buyer is telling me that when he plugs in the shortboard mkll, it flashes modulation, reverb and volume.as well as the lcd screen flashes yellow where it says tom sayer. he did say he was trying to "calibrate" it ? but idk what that means. He tried switching cables and nothing chnages. and i made him try other presets and he said it doesnt change it. How do we fix this. Now hes saying it doesnt work.