C125 sporadically doesn’t startup

[kurtd]

My C125 sometimes doesn’t boot but instead just shows all pixels of the display turned on, making the whole display white. If I turn the key off and back on, it will typically start up normally. I’ve confirmed the display is running the most current firmware. It is battery powered via a relay that is turned on via the key. Input is via CAN from my mM130. Any ideas?

Kurt

[David Ferguson]

What does the voltage drop to when you turn it off? If you have some voltage leakage or are back-powering it though an output or something, like most electronics, you could find that it doesn't power-on reset properly.

So what is the voltage between the Bat+ and Bat- pins when powered off?
What is the voltage on any Aux Output (measured between the Bat- and the Aux Out pin)?

[kurtd]

Thanks for your reply, David. I just confirmed there's no voltage across Bat+ and Bat- when the key is off. Same with Aux Output, which I'm also not using in my current setup (so it's unwired).

Kurt