Last year the latch broke on the soap dispenser. I replaced it and since then the lid will not open to release the soap. I bench tested the solenoid that actuates the latch and it works fine. The other issue I am having is that I get a message LO at the end of the cycle saying that the rinse aid is empty even when it is full. So today I replaced the main control board hoping it would cure these issues. But it didn't. HELP! Any input or suggestions would be appreciated.

I have visually looked at the wires and connections. They all look good. Is there anyway I can go into a diagnostics mode and actuate the solenoid through the control panel to see if it is getting an electrical signal?

I fixed one once, soap contaminated the electrical connections at the door latch connector and the timer pins. I just pushed on the pins and it worked. You might try non-residue spray on the timer and connectors and push all the pins in the connectors.