Arduino MEGA 2560

I work at this company and we had a local school develop an impact tester. to say the least it does not perform as it should, I have been tasked with getting this machine to work, so I opened it up, and there are some sensors that do not respond. I traced them to the Arduino MEGA 2560, and it seems to me like they wired it wrong so I was wondering if there was any one that would be willing to help me out to get this machine going.

Do you have the source code for the program running on the 2560? Do you have a schematic for how everything is wired?

Without either of those, it will be difficult for others to help.

I do have the source code but I do not have the wiring diagram. any sort of help is greatly appreciated.