Quote Originally Posted by Darrel Taylor View Post
It could be that half of the output stage is toasted.
Thanks again, Darrel.

You will no doubt be chuffed to hear that your prognosis was 100% correct.
I tried your LED suggestion and can confirm that PortB.0 was indeed dead - both ways. I've just taken delivery of some new '877s. Your LCD_AnyPin and all Ports are now working perfectly.

I think I owe you an apology for sending you all around the houses in the first place; I really should have had the noodle to check that port with a LED before bothering you. For what it's worth, I'm sorry for wasting your time, but I do appreciate you coming back just the same.

From myself, and on behalf of all the other members here, top thanks to you for sharing your work, and top thanks for sharing your much-appreciated know-how.

Thanks also for the heads-up regarding the Config thing.