macbook a1706 820-00923 NO SSD

[PITERPENY]

need help! macbook turns on but does not see ssd (folder with question mark). in disk utility also not through system recovery! 2.7v is missing!
PICCOLO_IUVD=1.83v!
PP3V3_S5_SSD=3.3v!
replacing U9300 did not give result!

[mon2]

What is the resistance to ground of the missing 2v7 rail (without power to the board of course)?

[PITERPENY]

found that PP5V_S4 is present but the lines have high resistance of about 21 ohms (instead of 8 kiloohms)! but there is no short! having dropped almost everything that is on this line (this is not a little)) I found the culprit of high resistance U3500! I replaced it and I got all the voltages on the SSD side:
PP0V9_SSD_REG=0.9v
PP1V8_SSD_COLD=1.8v
PP1V2_SSD_HOT=1.2v
PP3V3_2V7_NAND_VCC=2.7v
P2V7NAND_PGOOD=2.7v
but the damn SSD still does not see the Mac (

[mon2]

Maybe SSD is nuked?

[PITERPENY]

most likely! perhaps the ssd file is damaged since all U8600 PCIE_SSD lines are active and access the ssd but... another repair failed!

[mon2]

Be sure it is not one of these issues:

https://m.youtube.com/watch?v=WbuRSU...ndex=4&pp=iAQB

[PITERPENY]

he lost the line PP1V8_SSD_COLD=1.8v! I have it!

[mon2]

https://www.youtube.com/watch?v=VuY4gn1CkKM

[PITERPENY]

https://www.youtube.com/watch?v=VuY4gn1CkKM

In the video he just installed 4 new SSD chips! Don't they need to be programmed? Or is this only the case with the T2?

[mon2]

Never done this but yes, my understanding is only T2 needs the extra care. Dosdude1 has a similar video where he installed a fresh ssd using a board from iBoff. Check their website for details. Keep us updated on this case.

https://iboffrcc.com/pages/-guide-so...016-2017-a1706