[Android Head-Units] Toninello:
Please Help Me!!!!

Hi to all, this is my first post.....excuse me if my english language is not perfect and if I mystake something.

I allow myself to write in this 3D because I need your help. My HU remained Brik. My HU is as follows:

YT 9216B004 V 3.1 16g A005 - 20200313 (as reported by the sticker attached to the motherboard) instead (from a photo I took when my HU was still working) this was reported:

Android: YT9216B_00002_V004_20191225

System: Android 8.1 Go XY AUTO: 3.1 (8227l)

CAN PRO: 3.0 (8227L)

DDR: 1G FLASH: 16G

CPU: A7 1.3GHZ X 4

AMPLIFIER: AC7315 50x4

Resolution: 1024 * 600

MCUI: 9.7 (8227L)

I tried to insert one of the firmware in order to unlock it and to have the possibility of being able to completely turn off the HU so that the battery of my car would not run out since the factory remains in stand.by.

After several attempts I was able to have the HU recognized in SPF tool as a device: MediaTek USB port (com4) using the method of short-circuiting the two big dots.

As soon as I insert the USB port into the computer, the SPT program starts with the recognition (you can also hear the sound that windows seven makes when inserting the USB devices) and the red stripe at the bottom advances and then everything stops giving me the number 4032 as an error or the number 5054.

The error number changes according to the scatter I load.

I have read several of your discussions about the firmware of these units and about the errors that the SPF tool rpogram gives me but I can't solve them.

I would like to make some clarifications (without offending anyone's work, God forbid ... these are only the observations that I made after about 4 days of working on them) regarding all the procedures that I was able to understand by reading yours 3Ds (many times it is not very clear ..... or I don't understand):

When the user gouster3 describes the firmware update procedure, he should, in my humble opinion, specify that the male-male cable is to be attached to the 4-pin USB port located behind the HU, because otherwise you might think of attaching the cable to the front door of the HU .... also you could also use a male cable on one side and on the other side to be attached directly to the pins behind the HU (for those who have the possibility to remove the HU from the car) as well as I did.

Furthermore it could be specified (in a single speech) that using the SPF tool method there is no need to power the HU also because on the motherboard there is a small blue light that acts as a power supply light.

Furthermore, it could also be explained that short-circuiting the two large pins only serves to do it the first time (a simple pencil is enough to pass over the two points) .... since it happens to me that my HU is recognized even if I do not circuit the two points after doing it once.

Finally, I ask those who know more than me: is it correct that the HU is recognized as MediaTek USB port or must it also be recognized as MediaTek USB VCom port? or as MediaTek PreLoader USB VCom port?

Now my HU when it turns on it gives me only the logo of my car that I had set and then white screen ... it does not load android.

I tried to reset the hole with a clothespin but nothing happens. Maybe I should try to hold the reset and in the meantime turn on the HU and hold the reset for another seconds? Do you think it would work? (I need another person to give me a hand). I tried dieverse versions of SPF tool, different Scatter ... but, I repeat, sometimes it gives me error 5054 and sometimes error 4032. I also have another doubt: are the points to be circumvented only the two big ones or even the little one? since the 3D photo of the user "vicktorsaari" speaks of four points, the second of which is repeated twice. Honestly speaking, I don't know how the procedure to resurrect my HU could be done, including "preloader, boot1, boot2..etc ..." I don't understand anything anymore

Can you help me unlock my HU? Please ... otherwise I'll buy another one and to make it turn off, if I can't find the car's key wire, I'll connect the power cord + to a button ... and this HU I'll have to throw it away in the waste of the car. electronics (RAE in Italy):crying:.

Thank you all.

Regards.-