Troubleshooting software update issues

If a software update fails, you can try to download and install the update again.

About this task

These messages indicate that there was a problem with a software update:

  • Unable to download software image file
  • Invalid signature on software image file
  • Invalid software image file
  • Failed to complete software update for an unknown reason


  1. Tap this sequence:

    > Software update

  2. Tap Upgrade to retry the update.