Ron C Sarasota, , FL June 29, 2015 Appliance: KitchenAid Portables - Stand Mixer KSM90 Kitchenaid Mixer Ksm90: User getting shocked and no high speed. How to replace Stand Mixer Rubber Foot. Replaced deteriorated power cord, and checked speed control plate. Speed control plate bottom contact was open in all speed positions. Readjusted contact arm to eliminate problem. Then reassembled and readjusted speed control as per manual. While I had the machine disassembled, I also checked grease, and replenished. Do-It-Yourself Rating: Repair Time Estimate: 2+ hours