RoboRIO 2.0 Red Power Light

[chrisgerth0]

Hello! We're having issues with a power light stuck on Red again. I've read this usually means a short is detected on one of the rails. We opened up the case and didn't seen any metal shavings. We blew out the board and the case with compressed air and reassembled twice, no change - the light still stays red with nothing plugged in.

Is there any next debugging step we can take?

    

[Yeoj]

Try viewing in the driver station what if any shorts are detected (how-to in another thread linked here).

Additionally do you have a multimeter? What does any of the 5V or 6V pins to their respective grounds read when measuring DC voltage? Measure from one power rail pin to its respective ground (i.e. from the outer pin to the middle pin of DIO0 for example), as the externally facing ground on these ports appears at least somewhat isolated from the 12V input port.

Do you use the DIO or PWM ports for any sensors or features that pull power from 3.3V, 5V, or 6V from any of the available power pins?

I anticipate a NI support person will find this information helpful.


Jwal

[mshafer]

Hi  chrisgerth0,

I'm Matthew with NI. Thanks for posting on the forums.

It sounds like you're on the right track, but there may be a particular stuck piece of debris. Sometimes using a flashlight to closely inspecte the board can help.

As Yeoj suggested, if you're able to connect to it with the driver station, that can give us some additional information.

Please let us know what you're able to learn.

[chrisgerth0]

Hey all, sure thing. Apologies, just got back from Houston. Will do the clean out, inspection, connection to driver station, and provide some additional screenshots.

[chrisgerth0]

Hey folks, appologies for the massive delay, we had to move our warehouse and we're just getting stable again.

I was able to get the RIO hooked up to my laptop over USB and have the following faults shown:

Probing with a multimeter, the PWM outputs have 6V on them, and the I2C port has 3.3v funcitonal. However the DIO, Analog and SPI 5v lines are all measuring under 30mV

Let me know any thoughts on other steps to try.

[chrisgerth0]

Hey folks, following up. Any additional debugging steps to take?

[mshafer]

To make sure we're on the same page, you've opened the case (including the two screws at the power port which allow the back to come off) and used compressed air to blow off the board, and you've inspected closely using a flashlight for any visible shavings, and the short remains?

[chrisgerth0]

That is correct, all those steps have been completed.

[mshafer]

I've sent you a private message on next steps.