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I've spent many hours trying to get a 64128A going, but the only instructions it will respond to are to turn the entire display black and then back to normal, and to invert black and white and then go back to normal. I did get one line (a page, 8 dot rows high) to show up—once—and then could not do it again (although the previously mentioned commands still work). I have not found a data sheet on Displaytech's site than matches this LCD exactly. I have the data sheets for both the S6B1713 and NT7534 controllers, although it looks like the small differences between those two don't affect what I've been trying to do so far. I think this LCD has the S6B1713, but if we put it in a product, I suspect the current-production ones may have a different controller IC. What tricks are there to getting this thing going? I've spent a lot of time in the FAQs and reading forum topics here, and have come up with nothing. I found something in someone's private website that got me as far as I've gotten (mentioned above) so obviously the connections are ok, but I must be doing something wrong in the setup, or maybe not waiting long enough between commands (although I don't see anything in the data sheet requiring more than a quarter of a microsecond), or who knows what. I've also emailed Displaytech, and I get no response. Please help.