I just replaced the 2 control boards on this slide in range - part numbers 9782455 (display) and 9782437 (control board) . The display came with instructions to reprogram - basicly says after installing - plug range in and wait for "control lock" display to go out and a "PF" should display - then start to reprogram . I pluged it in - all the lights in the display came on , then control lock display - Problem is the control lock display just stays on - nothing else - appriciate any help ? thanks