ROM / Firmware/ Brick Recovery for 7" Android Head Unit AC8227l YT9217 YT9218 1/16GB

[electro_bordeaux1]

am I going to add these two files in the nome folder in Chinese?
or do something else

 

[Emilson]

Yes

 

[electro_bordeaux1]

Yes

here I have copied the metazone file and preloader in the Chinese folder as in the photo below
and when I click on format it gives me the message that you can see on the photo same thing on download

 

[Emilson]

Omg bro..
I see you doing everything blindly. i bet you didnt read any tutorial.

you still have files missing on the spflashtool list, even preloader.
Rename preloader file to preloader.bin or select existing name manually on spflashtool, because it still cant find it.
You need logo.bin file as well
Spflashtool list must be fully selected to do 'format all + download'
Anyway 'Format all + download' is an option in 'download' tab.

 

[electro_bordeaux1]

Omg bro..
I see you doing everything blindly. i bet you didnt read any tutorial.

you still have files missing on the spflashtool list, even preloader.
Rename preloader file to preloader.bin or select existing name manually on spflashtool, because it still cant find it.
You need logo.bin file as well, because is missing in this package, download from my attachment.
Spflashtool list must be fully selected to do 'format all + download'
Anyway 'Format all + download' is an option in 'download' tab.
View attachment 5859911

Thank you my brother for your help everything is going well format ok and download ok
is that all or is there something else to do?

 

[Emilson]

Disconnect and power up it again, and check if everything works

 

[electro_bordeaux1]

Disconnect and power up it again, and check if everything works

result black screen despite everything goes well

 

[Emilson]

You can try another firmware maybe for yt9212, But screen should work anyway. Did you ever disconnect screen to get the motherboard?

What your screen resolution? Is it horizontal screen or vertical one ?
That firmware was for horizontal 1024x600 resolution.

 

[electro_bordeaux1]

You can try another firmware maybe for yt9212, But screen should work anyway. Did you ever disconnect screen to get the motherboard?

What your screen resolution? Is it horizontal screen or vertical one ?
That firmware was for horizontal 1024x600 resolution.

it is the same horizontal resolution 1024x600 yes I disconnected the display to switch to sp-flash-tool

 

[Emilson]

What did you flashed for the first time? Was that ota update thru android or thru spflashtool?
Did you flash any preloader before ?

check your screen connection.

You don't have to use testpoints everytime you flashing regular firmware, you need to use it only when preloader is wiped, wrong or damaged. I hope you know that.

 

[dodo6]

during my attempts to flash the firmware, I also sometimes had a black screen, but it was backlit. I think that if after switching on the screen is black and there is no backlight, there is a problem with the screen connection

 

[electro_bordeaux1]

What did you flashed for the first time? Was that ota update thru android or thru spflashtool?
Did you flash any preloader before ?

check your screen connection.

You don't have to use testpoints everytime you flashing regular firmware, you need to use it only when preloader is wiped, wrong or damaged. I hope you know that.

hello brother Emilson
the first flash that I used with spflash_tool is on the photo below when I clicked on format it gives me format ok and after the station is stopped
is there hope to save the life of this position? and thank you

 

[electro_bordeaux1]

during my attempts to flash the firmware, I also sometimes had a black screen, but it was backlit. I think that if after switching on the screen is black and there is no backlight, there is a problem with the screen connection

I have no backlight on ignition except for the interface LEDs
connection between display and motherboard are ok and the set was functional before this update

 

[electro_bordeaux1]

here is a screenshot of the car radio information before this bad update

 

[Emilson]

That strange it doesnt illuminate the screen at all, as dodo6 I also had situation of no display but the backlight of the screen still worked anyway.

maybe it's one of those unusual models that you need the exact firmware from f9211/f9212, not just from
yt9211/yt9212.

On the 4pda forum someone gave a link to f9211/f912 models, you can try it, now you know how to.
https://drive.google.com/
there is already a metazone file and two different preloader files inside, maybe one of them will work.

https://mega.nz/ backup dump of f9212b

 

[electro_bordeaux1]

That strange it doesnt illuminate the screen at all, as dodo6 I also had situation of no display but the backlight of the screen still worked anyway.

maybe it's one of those unusual models that you need the exact firmware from f9211/f9212, not just from
yt9211/yt9212.

On the 4pda forum someone gave a link to f9211/f912 models, you can try it, now you know how to.
https://drive.google.com/
there is already a metazone file and two different preloader files inside, maybe one of them will work.

https://mega.nz/ backup dump of f9212b

thank you my brother Emilson for your support you really saved the life of this post
a question is can I do a more recent update and thank you 1000 times

 

[Emilson]

Im glad You made it.

You can try v7.3.8 firmware but select only 'ANDROID' and 'VENDOR' on spflashtool list and use 'Download only' option.
Optionally if you'll get a boot loop, select 'BOOTIMG' as well.

You can select 'CACHE' AND 'USERDATA' to clean user storage, like a factory reset, but Isn't necessary.

 

[electro_bordeaux1]

Im glad You made it.

You can try v7.3.8 firmware but select only 'ANDROID' and 'VENDOR' on spflashtool list and use 'Download only' option.
Optionally if you'll get a boot loop, select 'BOOTIMG' as well.

You can select 'CACHE' AND 'USERDATA' to clean user storage, like a factory reset, but Isn't necessary.

can i update with a usb key?

 

[Emilson]

Better not.
You can update launcher themes or apps by 'android upgrade' with usb key but not a firmware package because it will push other firmware files which may be not compatible.

although now you can try because you already know how to fix .

 

[electro_bordeaux1]

Better not.
You can update launcher themes or apps by 'android upgrade' with usb key but not a firmware package because it will push other firmware files which may be not compatible.

although now you can try because you already know how to fix .

Better not.
You can update launcher themes or apps by 'android upgrade' with usb key but not a firmware package because it will push other firmware files which may be not compatible.

although now you can try because you already know how to fix .

Better not.
You can update launcher themes or apps by 'android upgrade' with usb key but not a firmware package because it will push other firmware files which may be not compatible.

although now you can try because you already know how to fix .

I have version V7.38 as in the photo but I misunderstood how to do it you are talking to me about ANDROID and VENDOR which I do not see on the list of the file