Blinking Display on LAARS/Bradford White FT Combi's and Heat Only .

Blinking Display on LAARS/Bradford White FT Combi's and Heat Only .

A "blinking" display on LAARS/Bradford White FT Combi's and Heat only boilers "USUALLY " Indicates a faulty printed circuit board. But a faulty display can NOT be ruled out . 
The majority of the time it IS due to a faulty circuit board BUT there have been a few instances where a faulty display has been the culprit. 
ATTACHED  please see a video of the blinking display issue.