I have a POD HD400 that froze while trying to update, now I get DSP Boot Failed Error - tried everything listed above but no success, I get an error message on monkey every time after trying for 10-15min PodHD400 screen says Downloading.... until I unplug it - what can I do? How do you know it's in "safe mode" when re-starting while holding down A? It just says "push presets for factory restore"