Gostek

Update: I am able to enter Test Mode Menu. Is there any place I can download factory SD image ?

Hi guys, it is my first post in here. I am an electronics engineer, working in field for about 25 years now. I recently obtained a AVIC F960DAB with problem, but i don't know it's history. Unit once powered displays the following screen: then: What I tried to fix it: Download latest firmware from Pioneer website, extract to SD card - no change. Go to the test mode mode using testmode_a.key (with content from https://github.com/bassrock/AVIC-NEX/blob/master/README.md) only one key worked for me - 007PRODUCT003ALL00833333333007PRODUCT0082013010100820201230000, all