Display Problem

[jhat]

Hi all,

The display and menus seem to work just fine with the usb hooked up to my computer. But with the gauge hooked up to my car through the RJ11 I get nothing, no display or backlight.

I probed with a voltage meter and I'm getting 5v to pin2 of the LCD. I've got some more probing to do, but I wanted to see if anyone has any advice on this issue.

Thanks

[McTimson]

Check the voltages on the voltage regulator (the black square with 3 pins). Make sure one pin is ground, one is 12V, and one is 5V. And, make sure the regulator isn't getting too hot - it should be warm, but if it burns your finger, then there's a short somewhere.

Does the power LED turn on when it's in the car?

[jhat]

I probed the regulator and that seems to be fine; correct voltages and not too hot. No LED when plugged into the car.

I plan to probe for any other possible shorts when I get some free time.