Here are your parts
Replacement parts for FRIGIDAIRE PLEB30S8CCB Frigidaire/wall Oven | AppliancePartsPros.com
Here is the wiring diagram
It does show the clock/timer (Item F20 In Section 1) which is the control board as being available.
Does the broil element heat up?
If not you may have a power problem or the thermal circuit breaker (Item F119 in Section 2) could be open. Looks like it may be resettable if the red square between the contacts has popped out.