Pixhawc 6C B/E Light On

Hello, I am new to pixhawks and drones in general. I am working on a project for school involving the pixhawk 6c. We are building a robotic boat and it was working flawlessly until one day where I wasn’t present and some group members unplugged everything. I don’t know what happened but they might have done something wrong and now the B/E light is solid red. I tried putting it into DFU mode but it didn’t work and I’m actually worried I did more damage. Please let me know if this is salvageable, thank you!