34 upgrading firmware
6disconnect your psa to enable the device to upgrade itself. (you can drag and drop
your psa desktop icon to the Trash 
icon to disconnect.)
7press 2; briefly on your psa so that the device can upgrade itself. the psa display shows briefly: Fupgrade
note:
–Battery too low. Upgrade Rejected if you also see this message scrolling on your psa after FUpgrade, this means you need to repeat the upgrade due to insufficient battery power. always use a fresh battery to perform the upgrade.
–device names may differ to those illustrated, depending on your actual OS and psa model.
