turn off console, turn console on but keep finger on power button. it will beep and switch off turn it back on keeping finger on power button again. it will beep, then beep again. take finger off power button, it should be in recovery mode.
i'd suggest you use the 3.55 ofw pup you originally used. if this don't work, look in the forums for fixing semi brick from dex to cex (bleeping death). this might not work either, there is a forum also for brick repairs and downgrading i'd suggest you look in there and have a chat to racer.