I have a GE oven that the oven part only doesnt come on.

Most likely a bad bake element. Turn off the power to the range. Remove the oven racks. Remove the retaining screws holding the bake element to the rear wall. Carefully pull the element terminals out of the rear wall. CAREFUL now,the wires will be short. Remove the wires. If you have a volt ohm meter you can test the element for continuity. Set the meter for ohms or continuity and touch one meter lead each to the element terminals. If you get no reading replace the element with a new one. If you do get a reading your ERC clock is bad.