no error codes; is Clock/Timer EOC the problem?

[SIZE=4]40" w dual fuel, made by Frigidaire; digital control erratic, won’t display; but, if you turn on [/SIZE][SIZE=4]smaller side oven [controlled by [/SIZE][SIZE=4]separate knob, not digital like main oven] then the digit EOC display appears, but will not stay on for long. do I need to replace EOC? can I tackle that? I’m pretty good around house, do wiring, etc. how do I get to it? Thanks so much to anyone who can help.[/SIZE][SIZE=4] [/SIZE]