Samsung (gas) range some keys not working (bake, broil, clock etc)

We have a Samsung gas range model NX58H5600SS. The problem is that some of the control panel keys are not responding. Keys like Bake, Broil, Clock Self Clean doesnt work. But other keys like Roast, Pizza etc does work.

Few points to be noted:
- “control panel lock” is not locked.
- Tried disconnecting the power cable and restarting it after some time.

I really appreciate your guidance on how to go with troubleshooting this issue.

Thanks much
Ben

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via Samsung (gas) range some keys not working (bake, broil, clock etc)
by not_a_pro