[Al Skierkiewicz]

There are a few things to add here. On older PD boards, there were some components that were mounted near the edge of the board. Abuse could dislodge these devices.
The 8 slot Crios have a internal fuse that had been known to fail with other electrical issues on the robot. If you are going to open the Crio, use a DMM to check for continuity on the fuse.
There is also a breaker in the PD for the power supplies. If there was an electrical fault that continuously tripped one of the breakers, it is possible it failed permanently. Documentation on the PD is available online on the First site. I believe it is in the KOP section.