A couple years ago one of the 2 lights in my refrigerator stopped working. I changed the bulb but that did not fix the problem. I was too lazy to troubleshoot any further. Several months later the 2nd bulb stopped working and changing the bulbs did not fix the problem. Again, I was too lazy to troubleshoot. Several months after that, the digital cooling setting display stopped working. The refrigerator is still cooling fine, but none of the lights or digital display work. I've been too lazy to troubleshoot and too cheap to have a tech come out. Any suggestions as to what I likely need to replace?