Troubleshooting Hardware

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RoboRIO 1.0 No Longer Turning ON, Showing Red Power Light

Hello,

 

Late last build season we were trying to integrate a raspberry PI pico onto our simple working drivetrain platform before we put it onto the comp robot. We configured the pi, uploaded the code we wanted to run, and tested it through usb on a laptop and it worked fine. 

We then attached the Pi Pico to the RoboRIO 1.0, we connected it as such: +5v on the RoboRIO MXP to the VSYS pin (pin 39 on the pi), GND on the RoboRIO MXP to GND on the pi, and then a DIO signal pin on the RoboRIO to a GPIO pin on the Pi. Other things connected to the RoboRIO include the main power line from the CTRE PDP, the CAN bus line which has 4 Spark Max's and the PDP on it, and the rsl light.

 

When we turned on the robot with this set up the RoboRIO showed a solid red light on the power LED 😞 We turned the robot off and on again and the same thing, we plugged out the Raspberry pi circuit and tried powering it on and the power LED remained red. 

 

We expected we fried some component somehow or had a piece of aluminum causing a short and opened up the RoboRIO case and cleaned it out with compressed air, I couldn't visually see any components that blew up or any pieces of metal causing a short. After cleaning the RoboRIO we tried to power it up again and still had the solid red power light only. We tested the Pi pico using usb on a laptop and it still functioned the same.

 

Is there anything I can do? I have no clue when the RoboRIO was purchased, the team has had it for quite a while. 

 

 

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As a quick note, the red power LED means the image we use for FRC is detecting a short on a power rail.  The roboRIO is turning on and everything outside of the detected power rail is still operational.

 

The first thing I do when troubleshooting these kinds of issues is to open up the Driver Station.  I'd expect to see a red bar next to the lightning looking tab.  If you go to that tab, you should see a number next to the specific power rail showing a short.  That lets us focus on the rail that is reading an issue.

 

Canned air is a good one.  Sliding something gently underneath the rail is another. Visually inspect the affected rail to see if there's anything we can draw from that.

 

If you need help isolating the rail after getting the Driver Station input, we can help point there as well.

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