A lot of ovens will not work unless the timer controller is set.
As your display seems to have power-loss, it would suggest you either have a loose connection in the circuitry to the control panel or the panel is faulty and require replacement.
On occasions and always worth a punt, if you turn the power off to the appliance, leave a short while and turn back on, it may energise.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local