On Mon, Aug 10, 2015 at 4:41 PM, Ian Finder <ian.fin...@gmail.com> wrote: > The battery in the teletype DMD 5620 is mounted in a very fatal position, > and does indeed leak, as I learned this weekend.
Ow! > If you have not removed it, I would get on that now. Thanks for the tip. I just checked the Blit I received this summer, and the battery is thankfully intact. Zero voltage, but no leaks (yet). > In fact, if you still have batteries in anything, you might be doing it > wrong... ;) I lost an A4000 because I _thought_ I pulled the battery, but I was wrong. :-( It might be fixable, and I will try, but I'm expecting to have to replace it. Now I just need to find out why this Blit doesn't display anything when I power it on. The motherboard seems typical of AT&T products - a massive grid of square-pad-vias and a number of proprietary/private-label ICs. The firmware is on 8 27128s. In case I might have bitrot in 30-year-old EPROMs, does anyone have backups of the firmware I can test/reburn with? The RAM is 1MB of soldered Hitachi 50256s. Probably OK but no easy way to test them. -ethan