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If a dmd has a pin broken off at the glass I've always used a dab of electrically conductive paint on the glass to remake the contact.
It's very easy to use too much paint and short to the pin next to it (you then get two rows - or columns - showing the same thing!) but if this happens any excess can just be scraped off again.
This doesn't work for displays with surface mounted ribbon connectors, but with the more usual arrangement of pins (as with the display shown in this thread) this trick has always worked for me.
I think I got it from Maplin.....but it was about 10 years ago!
It was quite expensive, from memory the best part of a tenner for a pot so small it makes tins of Humbrol enamel look big (I thinks it's got silver in it which might explain the cost) but then so little is used each time that it lasts pretty much forever and it doesn't seem to dry up either - I used some only yesterday!
I'd be interested in if its still available though, and if so how much it is now!