I'm having a similar problem to some people, but it seems different to most! I've upgraded my unit to v2.x and the only mod I've made is to replace !alert5.wav (the barking dog) with a louder version of !alert6.wav. I've also recently updated the speed cam database via a SD card.
In the past, I've been able to boot from a couple of SD cards, one with the Pioneer 2.0 update and one with testmode on. Now I can boot into testmode but when I try and boot up onto an update card it is as though it's not bootable - does the LPUE080 folder have to be the only thing on the card? I tried the following filesystem:
/LPUE080/
/MiTACAP.dis/
/Testmode.dis/
(I didn't want to delete the testmode stuff but assume by renaming them that the unit would ignore them). All that happens is that teh AVIC ignores the lot and boots as normal, showing the main menu with "system startup in progress", which never goes away. I can press "behind" the dialogue. If I press tunes, it shows me the USB stick but when I select that nothing plays - same goes for radio. If I press the map button, it shows the disclaimer but doesn't get any further. After a reasonable length of time, the unit reboots.
I've tried deleting the gpspara files but no luck. I don't know how the handbrake cable is connected but it was installed by a Pioneer specialist.
F700BT (EU version)
1) Past issues (reboots, freezing) - has frozen when playing music and changing sound options; has rebooted occasionally, but never stuck on the startup screen until 3 days ago
2) Have you (or professional) upgraded your Avic to the latest update - I have upgraded to latest version, but can't boot onto the update any more
3) Did the issue start before or after the update, if applicable? - after, but was stable for a while (I updated when I bought the unit)
4) Did the issue start after a hack, a mod or a bypass? - after, but all I've done is replace one wav file with another, and renamed the original to .bak (so I now have !alert5.wav.bak (barking dog) and !alert5.wav (amplified version of !alert6.wav))
5) How long have you had the hacks, mods or bypass? - about 2 weeks
6) How long has the unit worked without a problem? - about 6 weeks
Hope someone can help - I think re-updating to 2.x is the obvious next step.