Daniel E Taylorsville , NC May 01, 2015 Appliance: Frigidaire Microwave PLMV169DCD Frigidaire Microwave Plmv169dcd: Work area light and night light operation. How to replace All Purpose Appliance Cleaner. My first shot at correcting the problem was to replace the touch pad. This repair was temporary and I found myself back at my original problem. I called Appliance Parts Pros and spoke with a technician. He indicated that my problem was associated with the control board. The light relays can not be replaced. You must replace the control board. Since the touch pad was not the problem, he said I should return it for credit toward the purchase of a replacement control board. Unfortunately, I had disposed of the old touch pad and could not retrieve the old touch pad. I was also told that parts have a one year replacement guarantee. I ordered and replaced the control board. Everything is working properly now. Thank You Appliance Parts Pros for all your Help and information. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes