Alesis Andromeda A6

Hello,

I joined the group because I am trying to repair an A6 for a friend that was bought used, and 
was having an issue where the screen would just change in the middle of a patch.  I tried 
updating the Os, doing hard resets, etc... but nothing fixed it until I just disassembled the 
entire unit and reseated one of the boards, reseated all cables and then I found that when we 
tapped hard on the chassis right above the pitch wheel box, thats when the screen would 
change.  So we narrowed it down to what seemed to be a grounding issue.  Now the screens 
don't switch anymore after reassembly, but now the mix patch selections don't work and 
then the screen goes weird and gets hieroglyphics in it.  

Tried another OS update and hard reset but still not working right.  Any suggestions?  I am 
pretty sure this is hardware related.