Having just gone through some problems with the power distribution board ourselves, here are the steps to try:
1. Check the status LED's (12V, 24V, and 5V) - are they all lit? The cRio should be hooked up to the black connector next to the 24V led. In
this picture, the connection is on the far right of the board. The white wago connector closest to us is 12V for the radio, the middle one (black with 4 contacts) is 24V for the cRio, and the furthest one is 5V for the camera.
2. Hook up a fresh, fully charged battery and check your voltages with a multimeter. You should see:
- around 12.6-12.8V on the battery terminals. If you don't see above 12V, stop and get a battery that is fully charged.
- The same voltage on all red/black connector pairs that have a breaker inserted
- The same voltage on the white 12V Wago connector for the radio
- 24V across the connectors marked "V" and "C".
- 5V on the 5V connector for the camera
3. Check for continuity between the two black connectors (the PD side and the cRio side). With the multimeter, stick one probe in the slot marked "V" on the PD side, and the other on the slot marked "V" on the cRio side - you should see 0 Ohms. Do the same for the slots marked "C".