MacBook 12" A1534, 820-00687- SSD not detected

[PITERPENY]

Hi all . I need advice because I'm at a dead end again. all voltages are present but the system does not see the ssd. The problem is old, maybe someone has encountered it or give advice on what could be wrong. MacBook works from an external drive.



measurements

PPBUS_G3H=8.7v
PPVIN_G3H_P3V3G3H=19.9v
PPBUS_S5_HS_COMPUTING_ISNS=8.7v
PPVBUS_LIO=19.9v
PPDCIN_G3H=19.9v
PP3V3_G3H=3.3v
PP3V3R3V0_AON=3.3v
PPVRTC_G3H=3v
PP5V_G3H=5v
PP5V_S5=5v
PP5V_S4= 5v
PP5V_S0=5v
PP3V3_S5=3.3V
PP3V3_SUS=3.3V
PP3V3_S4 = 3.3V
PP3V3_S0 = 3.3V

[mon2]

1) Check for any possible liquid damage or missing parts that are related to the SSD.

2) The SSD is a PCI Express (PCIe) interface so be sure the PCIe caps are not damaged nor missing. Review the schematic for reference.

3) Aside from the above, review this video and do read the comments - this model had heat issues that can lead to poor solder joints:

How to fix Macbook 12inch A1534 that doesn't detect SSD. - YouTube

[PITERPENY]

1) Check for any possible liquid damage or missing parts that are related to the SSD.

2) The SSD is a PCI Express (PCIe) interface so be sure the PCIe caps are not damaged nor missing. Review the schematic for reference.

3) Aside from the above, review this video and do read the comments - this model had heat issues that can lead to poor solder joints:

How to fix Macbook 12inch A1534 that doesn't detect SSD. - YouTube

hi mon2.
The board is practically new and there are no traces of moisture.
I substituted 2 pairs of other ssds and the result was negative.
Warming up the processor as in the video also did not give any results.

[piernov]

Still likely a CPU-related problem, very common on all A1534.