Ok, a huge problem you have is that water remains in washer even after it has gone thorugh the cycle, so you may well have sustained damage to the pumps and other components as well as the valve.

Even worse is the fact that this model is loaded with very inreliable electronics, and something could have been damaged with them during the storage time.

The tech notes under the cover will give detailed instructions on how to do some troubleshooting and testing, but in the end you may end up replacing parts on spec to see if you can find out the problem.

My recommendation: Give it try on the diagnostics, try replacing the main CCU and if that doesn't fix things a visit to the new washer machine store is in order. I would advise you to avoid any machine with electronic controls, for reasons you are only now to familiar with.

Good luck.