Using I/O pins

Author	Message
Turbo46 Guru Joined: 24/12/2017 Location: Australia Posts: 1694	Posted: 06:54pm 11 Dec 2019       Are you using a backpack? Sorry but Matherp is correct. Unless you have a faulty chip - check continuity. Power down the unit, remove the display and use a multimeter to check continuity from the pin of the '170 to the connector. Maybe the IC pin is bent under? Bill Keep safe. Live long and prosper.