Avin Avant 2 doesn't boot - Android Head-Units

Good morning, I have got an Avin unit Avant 2 for BMW E46 purchased on january 2015 with Android 4.4.1 and last firmware release
After two years of perfect run now I have a big problem. I want to make a short summary of avin e46 isuues. (sorry for my bad english)
On the 2th January 2017 in the afternoon I start my car from a park and avin unit run without problem;
After 10 min of travel with navi on, unit stop to run screen become black and when I restart the car or the unit avin logo was showed for a few second and after disappear:
On the 3th January 2017 when I start my car in the mornng unit was run regular but during the day i park my car and when i restart I've got the same issue of day before. So I try to make a soft reset but nothing run (
On the 4th january 2017 I hope then unit start after the night but when I start my car in the morning nothing run. Avin logo appears NOW for less than a second and anything run.
So I wrote an email to Avin support and after I try to:
- check wires and check battery (wires ok battery is a brand new exide plus)
- made reset factory whit power button (8 shot + 1 15 sec as you suggest) result RESET FACTORY DON'T START
- update with sd card in navi slot and reset hole with your software update result UPDATE DON'T START
- remove unit from the car and power in with a 12v dc external power source result SAME ISSUE THAN MOUNTED IN CAR
All thing that I do give me the same response: nothing.... run and avin logo for less then a second (power is ok because red light is on, cd run ecc ecc)
Please someone can help me because buying this quality unit was very expensive I have preferred it for a cinese unit but I need that it works fine. Thank you Marco

Avon avant 2 stuck on logo
My unit powers up, shows the BMW logo and then stays on Android logo and won't move on from that. I have tried the 8x power button rest but can't reset. Could this be a power issue.
Marco did you find a solution for yours?

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US $79.93 32%OFF | 10.1 Inch Android10.0 1Din Car 4Core Stereo Radio GPS Navigation WIFI Bluetooth Audio Universal Multimedia Radio Player
https://a.aliexpress.com/_mspYyDs
Model: 10.1 Inch Universal
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Greetz from Amsterdam
Hi, try first disconnecting canbus box if you have it at all on this device. Then start up head unit without canbus and wait for 30 sec then shut down headunit and car engine.
Connect canbus again on the back.
Start in contact mode of car, and as soon as unit starts start tapping on center of screen with all five fingers. When reovery mode activated it will proceed automatically and finish. (procedure will erase data and install again!)
Then try if errors and bugs are fixed.
Hello, just an update. Unfortunately this trick doesn't work. Is there a software update for it?
Ask your seller for solution, probably will be or you must do complete install / flash of ROM memory and install again everything.

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