Yesterday i went to flash my N9 to remove all the mods i had put on it as i was selling it on.

When i initially tried to flash it the flasher tool threw me some error about a bb5 checksum or something like that, i then decided to try and zeroize the device but having done this the device no longer seems to even register being turned on.

The screenshot attached is what i am now presented with when i try to flash the device.