What is next option?

I replaced the lower bake element 3 months ago, easy fix, worked correctly after… A few days ago, my wife informed me that it looked like the 4th of July inside the oven, when she tried preheating.. When I checked it the bottom bake element was broken cleanly off where it has the pop on prong to connect to the back L1 wire.. I again replaced the bake element,
Now I have no heat… The stovetop works fine, no error codes flashing, everything functions fine with the keypad etc… Broil, bake and clean will just not heat the elements,
All wiring on in the back looks fine, and as far as I can tell circuit board looked fine on back of the clock,
Any suggestions to find the problem??? Without just purchasing a new board, and hoping that fixes it, Thank you,

Here are your parts, includes a wiring diagram.
Replacement parts for Tappan TEF351EWB Tappan/range | AppliancePartsPros.com

Unplug the unit and check the wires to the elements and power into the control board.
If they are OK then odds are high that the control board is blown.

You will also probably need a new overlay.

I would order a new board, try it and if it fixes the problem then attach the new overlay to it.

If you order from AppliancePartsPros you can return the board if it does not fix the problem as long as you do the above basic troubleshooting. See their return policy.

I am assuming that the unit stays in pre-heat.
If it shows that the oven is ready then it may be a oven sensor problem.

Thank you for your response… if it does show that the oven is ready do you know where the sensor is located? Is that the same as the thermostat that sticks thru into the oven core itself?? Just.want ti check all options before i grab parts… thanks again.

Is that the same as the thermostat that sticks thru into the oven core itself??
Ye Item 37 in Section 2 of the parts.

Here is a link on how to check it, look at 7, 8, 20 and 21.
http://www.applianceaid.com/electric-range-repair-topics.php