After I dropped my spotmeter it did not work any more. I opened it, set all misplaced things right, resoldered a contact, and now works almost as before (I actually lost some segments of the decimal value display in the viewfinder, but the values display correctly in the external display).

So my advice is: if you don't plan to bring it to a repairer, before giving up on it try to open it and see if you can bring it back to work. It could just be a small problem such as a missplaced interruptor, some contacts not contacting any more, something that just needs to be realigned.