E N San Ramon , CA February 05, 2017 Appliance: Model WOC54EC7AS01 F1 e5; microwave would work for 8 seconds and then partially stop The error code incorrectly indicated a faulty inverter board. The real problem was the magnetron. I only was able to figure this out because someone had thankfully posted the identical problem on this board. The magnetron can be replaced yourself but it is an involved project. You will know pretty much everything about a microwave once you are done. It is unfortunate that the manufacturer does not publish the fact that this appears to be a common problem. My microwave/over was just past the warranty period. I also want to note that the personnel at this company was extremely helpful in assisting me to solve the problem and then put everything back together. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours