There are three rules I always follow now, after having this happen to me on lots of equipment, lots of times.
1. If it worked before, and I did anything to the equipment and it doesn't work now, then I did something wrong.
2. If something worked, and someone "Fixed", and it, doesn't work now, someones work needs to be checked and redone.
3. When working with wires, NEVER, EVER, remove wires and mark them with tape, or a felt tip pin. Always use a schematic, (if you have one) and LOOK at the wire numbers, (or colors) and hook it back up by the wire numbers, (or colors). Why? Because someone else could have wired it wrong. When you mark wires with tape of a felt tip pen, you just repeat their mistake.
There is no telling how many hundreds of hours I wasted before I learned these rules.
Glad you got it back into operation!