Is the cold weather (assuming you have it where you live) affecting your AVIC-Z1 in the morning? When I get into my vehicle in the morning (garage parked), when I back out of the garage, the screen is REALLY dim and dark. It may take up to a mile or two before I can easily read/see the screen. Why does it act like an old TV that needs to warm up before displaying its full brightness?
Chalk it up to the lcd screen. The same thing happens on my d1. It's just because the lcd is so cold it can't display properly. After a few it'll be fine. Completely normal. My d1 is now going through it's second winter doing the same thing, well unless I remote start the car before I leave.
I keep my truck outside at night usually and it's gotten down to the high teens lately and I haven't noticed that.
I've noticed that with my D2 the past week or two.
That is, of course, if I don't do like cntrylvr and remote start my car. Mannn I love that thing. Get into my car when its 20 degrees out and my seat is nice and warm, the car is nice and warm, and the windows are all defrosted 
I would advise anybody who has cold weather to get one. Its the best thing I've done to my car besides my D2.
This happens to any LCD screen. If you leave your cell phone or ipod in your car overnight, you'll notice that the screen appears to display slower than normal. Even on standard radios you'll notice that the display is not as responsive as normal (although its nothing major and won't cause any longterm damage).
i have noticed my z1 doesn't play any sound when weather goes about below 40 degrees, not sure if it is the deck or the PAC unit that hooks up to the factory bose amp & speakers. I have a Avalanche, I don't think it is the bose system cause I never had this problem with it the factory deck. Only using RCA.
Help!!!!!!!!!!!!!
Thanks for all of the quick replies people. I will relax now as it seems this is not a major problem, but just normal behavior for an LCD touchscreen.
I noticed that my PAC steering wheel control module doesnt resond all that well in temperatures below 40. The problem usually goes away once the cabin temperature rises.
I noticed that my PAC steering wheel control module doesnt resond all that well in temperatures below 40. The problem usually goes away once the cabin temperature rises.
it is my pac bose interface, when it gets cold, should I replace it you think?