Is it a brick?

[Ralf Mardorf]

On Mon, 11 Oct 2021 11:19:09 +0100, Grizzly wrote:
>Jumper moved 1-2 to 2-3

Unlikely, but not impossible:
Did you move the jumper back to 1-2?
I suspect this could happen.

Very unlikely, but still possible:
Did you insert the battery polarity-reversed?
This is hardly probable, in my experiences almost all batteries look at
us (with the logo up), if they are inserted correctly.