I had the same thing happen to my F90Bt. I called Pioneer and the first thing he asked me was did I have the parking brake bypass (he said that's why is did the endless reboot thing(?). He said to send it to Pioneer in Long Beach and $230 for a flat fee fix. Well instead I scoured AVIC411 and found reference to FX3.1.rar. So, after many failed attempts, and much reading, I was finally able to download and decompress the FX3.1.rar file. After three tries in the truck, I finally deleted the files in the device's "Flash Disk", and replaced those files with the "Flash Disk" files in FX3.1.rar. Well it works!! I almost fell out of the truck, me being a virgin hacker (haha), but now the F90BT works fine. The street detail labels on the gps maps are no longer there, but I knew that when I did the overwrite. Otherwise it was send Pioneer my money, or have a black brick in my truck's dashboard. I'm happy as hell, it plays DVD on the fly, no more "nag screens", works great! This whole .rar and winrar thing was all very new to me, at first I didn't know what the hell the threads were talking about. After going to the Pirate Bay website where the FX3.1 file was hosted, I did some reading and was able to download it. So if you are the type to risk bringing up the Testmode on your AVIC, FX3.1 will bring your unit back to life. I've had my unit for about four years, with the brake bypass on it. It works fine until I loaded the 2.008 upgrade from Pioneer. After that, it started to nag me about an incorrect wiring mod, and wouldn't work for DVD on the fly, or GPS changes on the fly. I had to stop, put it in park to watch a movie, or change destinations. So I just let sleeping dogs lie, but last week it went into the endless loop of "system re-boot", and I could only get the radio for about 2 min. Well I'm glad I researched this site, and thanks to the hackoids who came up with the FX3.1 fix. Overall, with the initial cost ($800), installation ($300), and the map upgrade ($130), well that's was a lot of cash to be stuck with "Big Brick". I would recommend the fix, but you run the chance of screwing it up completely if you don't follow closely the directions.