Display blank,oven shuts off,press display comes back

The display would just go blank sitting idle or when using oven, oven and timer would shut off and display go blank. Just pushing on display it would come back. So I replaced the front oven control assy. Not that difficult to replace. But new unit does same thing? Really confusing to me, I'm now waiting the relay control board to replace next along with heat sensor. Again removing wasn't to much trouble, of course Turn Power Off first. 4 screws to remove, kind of work it out away from relay board, remove connectors, plastic lock might break from brittleness, but it won't cause a problem. Remove mounting brackets and put on new assy, repl connectors, work back in to mount. When removing cover mark burner brackets as to FR, RR, FL,RL, the heat shield comes out, remove 4 screws, lower one side raise other and it comes out just fine. That's about it, I'll let you know how the relay board goes when I get it and if it fixed the problem.