What should I check if the microwave oven fails to operate?

First, check that the oven is plugged in securely — if not, remove the plug, wait 10 seconds, and plug it back in. Also check for a blown circuit fuse or tripped circuit breaker, ensure the control panel is programmed correctly and the timer is set, and confirm the door is securely closed engaging the door safety lock system. If none of these steps resolve the issue, contact a qualified technician and do not attempt to repair the oven yourself. (Page 7)