I looked your model number up at the Sears parts site where they have actual part breakdowns and it show the unit as being all gas.
Please check your model number.
I would start by checking the power as the control board etc. uses 120 volts but the oven elements require the full 240 volts.
Try flipping the breaker off/on slowly a couple times, sometimes you can loose half the line without actually tripping the breaker.
If this does nothing, check the voltage at the plug
L1 to L2 should be 240 volts
L1 to Neutral and L2 to Neutral, both should be 120 volts.
Unplug the unit and check the wires at the terminal strip in the machine to make sure none are loose or burned out
Check the power at the terminal strip.
Be careful as 240 volts is lethal !!!