you are not alone : www.kopterforum.de/topic/52497-phantom-3-professional-device-not-detected/ Firmware upgrade seems to brick the video control devices. You will get something like the hidden log and no amount of downgrading or upgrading will fix it. So far the only solution I came across is back to the dealer with it. [00015377]Version checking[1]... [00015500][03 05][00] v34.2.0.9 -> v34.2.0.9 [00015599][03 06][00] v2.4.14.5 -> v2.4.14.5 [00015683][04 00][00] v1.44.0.0 -> v1.44.0.0 [00015845][11 00][00] v1.7.15.1 -> v1.7.15.1 [00015974][12 00][00] v1.10.0.0 -> v1.10.0.0 [00016100][12 01][00] v1.10.0.0 -> v1.10.0.0 [00016214][12 02][00] v1.10.0.0 -> v1.10.0.0 [00016360][12 03][00] v1.10.0.0 -> v1.10.0.0 [00028955][15 00][00] device not detected. [00029069][17 00][00] v1.1.1.7 -> v1.1.1.7 [00029234][17 01][00] v1.0.2.7 -> v1.0.2.7 [00029329][19 00][00] v1.0.8.96 -> v1.0.8.96 [00029407][01 00][00] v1.30.5036 -> v1.30.5036 [00029493][01 01][00] v1.30.5036 -> v1.30.5036 [00042068][08 00][00] device not detected. [00042170][09 00][00] v3.0.0.10 -> v3.0.0.10 [00042249]Packet upgrade failed at version checking.
