Gen 2 factory gauge issue

Recently my gauges started to take appx. 30+ seconds to iluminate (speddo, tach, boost ect...) after turning on any lights (running, head, or fog lights). The guagues funciton no problem just don't light up right away. I've had the battery tested thinking maybe it just wasn't pushing enough amps right off the bat but it's perfect. Ever seen this issue? Easy fix? Any suggestions so that when I take it to the dealership they stop giving me the "We can't duplicate the issue"? :help:
I have seen this and it turned out to be the cluster itself. No dealer repairs them, we all send them out for repairs, but I would alco check the harness plugging into the back of the cluster to make sure you do not have a loose wire or a connection issue.