T55

Okay, I'll try that. Thanks

I assume you mean your old firmware was v2.0? yes I think F9220bt is an Ford version of f920bt. What do you mean by "used test mode to use backup"? To load my old backup Did the boot back into the old firmware OK? Yes, back to old firmware.

Hello everyone I have an avic-f9220bt. v2.0. Has update for 2017 and now HU starts again and again at the Pioneer logo. Updated with shortfusescript and 2017 software. Have used test mode to use backup and installed 2017 again with other sd card, but same, HU starts again and again by the Pioneer logo. What can I try?