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So unfortunately the only thing that can cause this issue is the board directly below the touch pad that you're pressing to select the burners and such. The relay power board is attached to the touch control board which makes the part incredibly expensive. If flipping the power off didn't reset the logic in the board, you'd have to replace the board which is part number 640374 and I'm sorry to say that is costs about $600.
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Something isn't correct with the model number you gave me then because for the model number you gave me, there is a control knob on the right side on the top of the cooktop to control the cooktop burners.
As for the charges from Bosch, there is a 1 year warranty on the product so if you have proof that you bought this in April of 2015, Bosch must repair the unit at no charge.
OK well on this model each burner has it's own independent burner switch. So either all 4 burner switches are bad, or you have a bad wire connection somewhere between the terminal block and the burner switches on the front of your oven. This issue would be really really difficult to track down unless you're a technician.
Alright good luck. As I mentioned, if it was bought in april then it's still under warranty. You just need to provide a receipt showing that it was bought less than a year ago.