Bugsy_malone_666:
it just started working and displaying the sample script!
OK. I guess that might end the discussion on pins and libraries....
Your display could be suss.
I understand these are manufacturer's surplus and not necessarily 100% kosher. All of mine are on a shield. One of them never fails to start, or reset, but might die after a few hours - or days. I have never been able to fix this and now I don't know if it's the display or the shield. There is only so much re-soldering one can do. The other 5110s are just fine.
The reply #10 above reads like nonsense but may not be, for the same reason.