Ron C Sarasota, , FL June 29, 2015 Appliance: KitchenAid Portables - Stand Mixer KSM90 User getting shocked and no high speed 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. Read More... Do-It-Yourself Rating: Repair Time Estimate: 2+ hours Tools: Pliers, Screwdrivers, Wrench Set