Katie L Yakima , WA September 28, 2014 Appliance: Model JE186WB001 Microwaves arched and zapped when appliance was turned on causing bright flashes of light and noise Noticed there was a black hole burned through the waveguide cover. Replaced the old waveguide cover with a new waveguide cover. Problem solved! 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes