Macbook A2289 820-01987

[2informaticos]

Find a way to post usable link (not private)...

 

[sourcensolutionsonline@gm]

Any Ideas Yet on why that behavior ?

 

[sourcensolutionsonline@gm]

I Have uploaded the video on Youtube and sent you the youtube Link .

 

[sourcensolutionsonline@gm]

 

[2informaticos]

If machine works from battery and load macOS, you must center on USB-C area.
Just in case, check voltage and diode mode on SCL/SDA lines of battery bus; before and after Q6950.

You can try flashing TBT ROM now (U2890).

 

[sourcensolutionsonline@gm]

Right , I said the same thing too , since its booting properly, I will check voltage and diode mode on SCL/SDA lines of battery bus , then Q6950, For U2890 I don't have any dump files here to flash it , do you have another way of doing so?

 

[2informaticos]

A2289 820-01987-06 U2890.bin

drive.google.com

 

[sourcensolutionsonline@gm]

What device do you use to flash U2890?

 

[2informaticos]

You can use any BIOS programmer, including cheapest CH341, with proper adapter.
A4069 is the most versatil.

https://www.cmizapper.com/products/t2-chip-stuff.html

A4595 ROM Solder Board

 

[sourcensolutionsonline@gm]

Thanks for the infos, I am getting this one which is showing very advanced and easier to deal with , Let me know if its adviceable.

BY-U301 DATA ASSISTANT FOR MACBOOK READ WRITE BACKUP REPAIR

 

[sourcensolutionsonline@gm]

 

[2informaticos]

If you don't care about money, no problem...

 

[sourcensolutionsonline@gm]

Great , I am getting a great deal, so i am ordering one , Will your bin files work with that device too?

 

[2informaticos]

Why not?

 

[sourcensolutionsonline@gm]

I Have not done before , I just ordered the tool today, as soon as i got it , I will try it and keep you updated.

 

[2informaticos]

You can write what you like with any BIOS programmer.

 

[sourcensolutionsonline@gm]

Ok, Thanks.

 

[sourcensolutionsonline@gm]

I got the The tool to flash the U2890 , Now I downloaded the bin file you sent to me but when i go to flash its not appearing as a valid file. Can you please help me out with that?

 

[2informaticos]

No idea about that tool, I don't have it...

 

[sourcensolutionsonline@gm]

The device came with the instructions and its software even the Bin files for all the other macbooks are included , but i am not sure when i read U2890 it goes fine but as so on as i try to write the file on it its giving an error saying chip is not properly inserted or there s a problem with the chip, I went back to run a few check to see and I found those power rails :

TBT_X_SPI_CLK , = good diode mode reading but 0.00V
UPC_XB_SPI_CLK = good diode mode reading but 0.00V
PP3V3_G3H_RTC = 0.70 low diode mode reading 3.3V is that normal?

I am waiting for the seller to contact me , I dont know if causing the issue and can that chip be changed directed if i rewrite the data on it .