Electronics troubleshooting takes a bit more knowledge than that required for simpler things. In a logic circuit, it can be hard to understand what a particular level means as it could be going on/off (high/low) rapidly, and look like a certain level when it really isn't. Analog often is easier, but also requires understanding and the ability to read the diagrams and understand the troubleshooting and theory of operation often given in the manual is necessary. If you change enough parts, you'll probably fix it, but it may be after replacing lots that didn't need to be. Sometimes, not calling a pro ends up costing more than doing it yourself as you might damage a new part that is caused by some other failure.
Wish you luck. If that hose leaked while there was bleach, softener, and/or detergent in it, those things can damage electrical and electronic parts. The residue can be somewhat conductive and destroy various components, get into connectors so it then corrodes or adds resistance to the connections. Drying it out often only works if it was clean water and the thing was not powered on at the time. Sometimes, you get lucky. Sounds like you did not.
