late 2013 A1398, SSD missing

[bmw321]

Hi All
I have a problem with SSD on 820-3662-03.
Have tried to put in m.2 but still no ssd in disktool.
It works with external usb hd.
Maybe there is a problem with C3710 to C3717 on motherboard? (have seen it in another thread in this forum) but I cannot locate it on the board, so i can messure it.
Is there an expert in here, that have seen it before, or have any other idears.
Thanks in advance.

[piernov]

Re: late 2013 A1398, SSD missing

Use original Apple SSD (even used). Non-original SSD will cause issues.

The Macbook needs to have received High Sierra or Mojave update prior to plugging in an NVMe SSD.
Also it has to be NVMe, not SATA.