"12v supply came loose and bare +ve line 'touched down' briefly at locations unknown with smoke & glowing components.  Replaced processor which got LCD back but with Si error. Si replaced -

error remained"

Replaced IC1 again then D1 & 2, plus remade some dodgy soldering. Working well enough to do the basic alignment but on next switch-on the 3 buttons + rotary encoder are not responding sensibly if at all  & l get loud buzzing in earpiece if I key the tx any suggestions where to look? 

My sharp-eyed steady-handed helpmate (9V1AN) still forbids me to scrap!