I search the refrigerator forum here but didn't see this question.
I found the list of things to check: https://www.appliancepar...ator-repair-help.html#13
but I have only replaced the bulbs so far.

The problem is random. Sometimes the lights come on, sometimes they don't. Sometimes there's even a second or so delay before the come on. I replaced both bulbs, no different. I even tried playing with the door switches but once the lights do not come on, no playing with the switches makes the come on.

I'm just asking before I go down the whole take-everything-apart route-- is there one component that is the most likely to be the issue with these symptoms?