Need Appliance Repair Help? Ask a Technician for Answers ASAP
As you are attempting, you should just need to press and hold 0 and 9 together for 5 seconds to remove the control lock. If that is not working, try to unplug the oven or flip the circuit breaker off for 5 minutes to see if the electronics will reset. If none of that works, the logic board is just going bad which is why it keeps going into control lock on it's own so the display board would need to be replaced to resolve the issue. Below is a link to the main logic board for your model.
CLICK HERE for main logic board
We are on the honor system here. Please remember to rate my service by selecting a star at the top of the screen before you leave today and reply back here letting me know with a rating of 1-5 stars (5 being the best). If you need anything else, just let me know. You can continue asking follow-up questions at no additional charge after rating my service if you still need assistance.