Steve P Edina , MN November 24, 2014 Appliance: KitchenAid Microwave Hood Combo KHMS155LSS3 Kitchenaid Microwave Khms155lss3: Clock display would beep and lock up panel it set. How to replace Control Panel. Replaced Pani-Cntl and clock/microwave have continued to work for 4 days. Am waiting a few weeks, because sometimes in the past it would work fine for a month and then beep and lock up. If that happens I'll go back to the old Pani-Cntl and replace the microcomputer board. If someone knew the best way to do it putting it back together again it would of been much faster and it could be done in less than 30 minutes. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes