CONCERN: Customer reports GE L/F Glass cooktop burner is not working. Model JBP72B0K1BB DIAGNOSTIC AND CAUSE: Inspected cooktop for proper voltage from supply line, voltage is normal. Inspected cord to terminal block for signs of failure, cord to terminal block is normal. Inspected voltage output from control to infinite switch, voltage to infinite switch is normal. Inspected voltage from infinite switch to burner, voltage from infinite switch to burner is normal. Inspected burner receptacle, receptacle is normal. Inspected and performed Ohms test on burner, found burner assembly failed. CORRECTION: Replaced L/F Glass cooktop burner and tested. Operation now normal.