How much does it cost to change a flash?

i have Pentax K100D and its flash suddenly started not to work. it only makes a sound but not a flash of light. the flash is integrated, how much could it cost to change it?How much does it cost to change a flash?Is this camera still under warranty? If so it should cost nothing. Otherwise you must contact the Pentax authorised repairers in which ever country you are (a list would have come with the camera) and get a quote for repair.

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