Dishwasher started random beeps when not running about a year ago. Beeps got more frequent, sometimes 3 times an hour. Diagnostics showed nothing wrong. Display then went dark. Used YouTube to diagnose and found led on constant on main control board, but with still 14VDC output on pins 1 & 5 to UI board. Ordered UI board on Thursday, had it on Friday! (Live in Virginia). Followed Youtube to replace UI board, about an hour to do. Works perfectly and no more beeps!