820-3208 NO SSD Detected

[MeTech Turkey]

Hello I have my customer's macbook air A1465 ( 820-3208) and it does recognise and SSD we tried different SSD( not sure all of them working as we dont have any known good working one yet) but when we measured the socket J4501 we get all voltages as it has to be.

Only we have surprised with we read 3.3V on 1st pin of R7988 as it says that there must 1.5V with no SSD plugged in. I dont know if this is normal but this is the only thing we had found weird.

We also get 3.3V on reset line of J4501 too.

Any other advices?

Thank you

 

[2informaticos]

Discard first an APFS issue.
If you boot USB macOS, SSD is not recognized at all in Disk Utilities?

 

[MeTech Turkey]

Let me try that first I got what you mean

 

[MeTech Turkey]

I have booted high sierra from usb because it didnt let me to boot monterey, but it didnt recognise the ssd in disk utilities

 

[2informaticos]

"Only we have surprised with we read 3.3V on 1st pin of R7988 as it says that there must 1.5V with no SSD plugged in"
Who said that???
There MUST be 3V always when the board is turned on.
Don't make confusion between a voltage rail and enable signal!

You may have problems with U4510, or its adjacent components.

"when we measured the socket J4501 we get all voltages as it has to be"
Including pin 24?
How are you sure about the expected values, in case you make an wrong assumption, like above mentioned?
Did you compared with good board?