Nav intermittent boot, common problem on cold mornings?

[danieljsinclair]

I've had this problem with my old MK3 unit and now the MK4 is playing up.
Basically, it struggles to boot some mornings. It loops in an almost endless reboot cycle, only usually making it as far as the logo screen, occasionally showing the menu or map for a few seconds and then rebooting again.

Strangely, some mornings it will work just fine. I've noticed that it *might* be related to colder weather.

If I go on a long journey (an hour or more) it may finally start working around the end of the journey - warmed up perhaps?

[bmwnavnewbie]

I get something similar on my Mk4. Usually doesn't even get to the logo/splash screen. Happens first thing in the morning, but last time was 70deg F so it's not exactly cold. Happens once every few months. I thought it was a problem with DVD reader, but this last time, I ejected the DVD and it still had the problem. I was wondering if it's my custom splash screen, but it shouldn't only have an intermittent problem with that at such long intervals.

[danieljsinclair]

Interestingly (and I know this is another familiar symptom I've seen other have), if you hold down the eject button it will boot and work OK. But as soon as you let go it reboots again.

The reason that I don't think it's related to the quality of the CD/DVD disc itself is that if I can completely eject the disc (if it's reluctanct, keep pressing) then I *should* get the system to boot to menu and the GPS should ask me to insert the map disc. However, it behaves exactly the same way - ie. constant reboot cycle, but holding down the eject button allows it to boot.

I'm wondering if this is a loose connection of some kind. After some fiddling with the connections it's now on again. But I suspect it will fail again soon enough.

I would love to get a definitive problem/solution to this one as I'm sure many others would. Clearly, it's possible to have issues with a poorly burned backup disc, but I don't think that's necessarily the case here.