820-3476 not recognizing SSD

[bjf]

This was not liquid-damaged. Just stopped recognizing SSD's. Tried a bunch. No change. Any idea what would cause something like this? Not seeing anything off yet.

 

[JohnB8812]

Check voltages on the SSD connector especially pins 1, 8, 24, and 47. You do not need an SSD plugged in to measure.

 

[2informaticos]

First start with USB OSX and check if Disk Utility sees the SSD at least.
Just in case is a problem with APFS and BIOS; is better to discard that first.

Next, post U3740 voltages.
Be sure U8070 and L3700 are good.

 

[bjf]

Thanks, that got me there. Had some crud on the back of the connector on pin 47 that the ultrasonic didn't get. Wasn't getting voltage because of that. Working now.