I don't know where to start troubleshooting my dish washer Fisher&Paykel DS603I. It stops a few seconds after trying to start the washing cycle. I can not see any display screen; it may have been covered by the custom made panel. The custom made panel only shows three buttons: power, start/pause and lock. The dishwasher is 8 years old and it has had very light use. Last time the dishwasher was used is 7 months ago. Any help will be appreciated.