ok so i'm an impatient idiot
i didn't have midi out working but midi in worked so i uploaded the rc34 hex to my sammich
obviously it froze waiting for the core to respond
so i re tried it in manual mode which seemed to work
i have this screen now see attachment (sorry mobile phone pic)
but none of the buttons or encoder do anything
except F2 makes the led's turn off when i push it
resoldered it makes no difference
any ideas where to check for bad times?
all the top and bottom board chec