Thanks for the schematic.
Last week I needed help with Powertip PG128128A LCD but nobody bothered to answer for about three days.
Did you ask about it in this forum ? I just tried to look around but didn't see anything like that.
Anyway it's not that strange in a forum like this that you won't get answer immediately. I for example haven't had time to be here in the last four days. Sometimes posts can be also missed and then noticed weeks later...
But looks like you solved your problem yourself