After some more playing with my cams (a620/a630) I came to the conclusion that they also don't react
properly in REC mode, so for the moment I've disabled rebooting in REC mode (since quietschi's i70 seems
to work OK, this might not be necessary for cams with a 'soft' REC/REVIEW switch) Also, I think it might
be necessary to first bring the cams in a state that resembles as much as possible 'Canon review mode',
which means to first end <CFG>, and then <ALT> state, before issueing the actual cold_reboot command.
@Dataghost
Which jump address are you using on your cam ? And do you do any 'housekeeping' before jumping ?
Updated Cold_reboot.txt (v4) attached
later,
wim