Hi, I have Whirlpool (oven) Type FXQM6 Mod AKZM 764WH. There is no light on the display. I haven't any wiring diagram so I cann't measure and be sure are all voltages OK on the display board. But anyway there is 'many different' voltage levels on the board. How to do better problem determination? Can I get the wiring diagram to see correct voltage levels? Do you have the part list for the boards?