[OM] OM4-t Hi.light & Shadow buttons not working

[OM4 Land]

Hi all-
   
  It's been a while since I've been around but now I have question.
   
  I just put fresh batts in my beloved and everything works as normal (spot, 
memory, clear, exposure comp, view finder lamp...) but nothing happens when I 
press the " Hi.light" or "Shadow" buttons.
   
  Anyone familiar with this?
   
  Thanks,
  Barnaby

       

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