Hello, I have the problem with the nno vna h, that the submenus no longer work.
I was calibrating a range of frequencies, and I stopped. since then the submenus no longer appear. It is practically unusable.
I tried to clean the screen from dust but nothing.

perhaps the case is pressing against the display too much, try loosening the screws a bit.
73 Ton

he does it to me even without a lid 73'ss Claudio

I tried to remove the screen, loosen the screws, use it without the screen, but the problem is always the same: it gives me the first drop-down menus but not the submenus.
Please help me, I need the nanovna, for checks. Thanks Best regards Claudio