Are you sure those are the exact lights on at the beep? If so then you have an unusual but serious problem. It means there is a problem with either the display circuit board or the main control board. The only way to know which one is to replace 1st the display board and see if that cures the fault. If fault still there then replace the main controller board. You do not want to go spending big money buying both when you don't need both. Best to get a service company come and they can try their spare boards to see which one you need.

Lincoln Appliance NZ
August 2011