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This sounds like a clock issue, I am assuming that where it now says 11.11 is normally the time?
Can you tell me the make and model number please?
Make of this wall oven is Chef Condor two oven type model number from stick on badge is 075E4FA21 fan forced oven. Sales Code EW09FC
When ever I power up the oven the display will always be on 11.11 and can not be set or altered. There is a buzz hum coming from the display except when I rotate the set knob around to AUTO. The buzz disappears but still no normal operation from the oven. Just checked again, no change.