Hi,Welcome to Just Answer, My name isXXXXX will be helping you with your appliance issue today.
There is more to this model number, can you get me the rest of the model number?
It is a GE PT956-30" Double wall oven.
Other models listed in the owners manual are
pk916-27" single wall oven
pk956-27 Double wall
pt916-30 single wall
and pt956-30" double wall.
You control panel has failed, that is the keypad that you push to set the oven, what I would do is go to RadioShack or Lowe's and get some HQ contact cleaner and clean the ribbon between the clock and control panel unplug it spray both the control panel receptacle for it and the one on the clock itself, part number 997 on this diagram,
if that doesn't work you will need to replace the control panel this is expensive $307, hopefully cleaning the contacts on the ribbon takes care of the problem, you can go to the link below, for all the diagrams,
Hope this helps thanks, Bryan
You should be able to get to this control panel by removing screws either under the control panel when you open the door or possibly on the side of the control panel after a screws there, the diagrams are not too clear on that just make sure you shut the breaker off before attempting any repair, wish I could give you exact procedure but the diagrams just don't show it, thanks Bryan
PS, you shouldn't have to remove the oven but sometimes you do have to pull it out a bit to get at the top if that's where the screws on this panel