Kenwood dishwasher KDW12ST3A?

dishwasher started displaying e4 so I read troubleshooter and read water inlet problem. I then took bottom off dishwasher after noticing water everywhere and electric had tripped and found a hose disconnected. I reconnected hose and dried out with a hair dryer, when I connected all back up it turns on but the program selector wont come on, when I first put it on it all lights up but then nothing, can someone please help thankyou