Oven control panels vary in design, but most use a number of standard electrical parts available at stores that sell electrical equipment. However, most parts are soldered into place and are difficult to remove, so control panels are generally sold as self-contained units.
If a control panel malfunctions, repair guides typically recommend replacing the entire unit, since diagnosing the problem can be difficult. However, people with experience handling small electronics often have tools that can diagnose which electrical component has failed. Small parts, such as capacitors or resistors, are generally labeled well and are inexpensive to purchase, and soldering a new component into place can resurrect an otherwise operational control board.