Not an expert, but had similar experience, hope it is helpful:
First check your circuit breaker in the basement that marks "stove" or
something similar. Turn it off then turn it on, check your stove.
If that does not work, google the brand, model number, etc of your 煤气炉子,
you may get some helpful info. If it is the 电路板坏了, it should be
repairable, but it will cost at least $200 I believe, depending on brand/
model.
Good luck!