If you never get the boot progress bar, the phone may be bricked. MiNET is the protocol the MiVB uses, all the other Mitel platforms use SIP. If you can at least see a boot progress bar, you can get into the settings and point the phone to a TFTP server to download firmware. Worst case, let it boot for a bit and keep trying the settings key to see if you can get in. The Advanced settings/administrator passcode should default to 73738.