Doug W Albuquerque , NM September 25, 2015 Appliance: General Electric Free Standing Microwave JVM1790SK01 Ge Microwave Jvm1790sk01: Bad circuit board micro wave timer was not consistant. How to replace Control Board. Remove loover on top, remove Philips screw above screen and screw on bottom right. Contol assbly comes out, attached by wires, Take your cell phone and photograph where wires go. Most connectors have a clip you pinch to release, green flat wires , you lift connector and wire ribbon slides out , be gentle. Remove silver colored Philips screws that hold board in place, remove board and install new board. Reconnect wires, plug in, set time. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes