820-3476 DOES NOT DETECT SSD

huzeafa

Member
Good day guys.

please I need your help, have got 820-3476 that does not detect the SSD, at first would detect the SSD, but the machine would freeze once its booted to the desktop, then it eventually stopped detecting the SSD completed, below are the measurements I have of the SSD connector circuitry.

on the connector J3700

pin 1 to 5
PP3V3_S0SW_SSD_FLT =3.3V

PIN 7
PP3V3_S0 = 3.3V

PIN 8
SSD_RESET_CONN_L = 3.3V

PIN 24
SSD_CLKREQ_CONN_L = 0V

PIN 25 TO 28 = 3.3V

PIN 47
SSD_PWR_EN = 3.2V

PIN 50
SSD_PCIE_SEL_L = 0V

PIN 51
SMC_OOB1_D2R_CONN_L = 3.2V

PIN 52
SMC_OOB1_D2R_CONN_L = 3.2V

SSD_RESET_L = 3.3V

PLEASE HELP
 

2informaticos

Administrator
Staff member
Did you try known good SSD?
Also test with USB macOS (HS, or Mojave) and check with Disk Utility.

Clean SSD connector and check traces.
 

huzeafa

Member
I checked, with a known good SSD, also used its SSD on a different machine, I also cleaned out the connector, booted with a USB macOS , but the drive Is still not detected
 
Top