MacBook A1707 820-00281 Boot Loop

[Strolch]

I opened my good MacBook A1707 2017 to take measurements. I measured pin 43 and 1 yesterday to compare with my defective A1707 ;-( now the MacBook doesn't start either. The gong only comes on every 5 seconds! It's in a boot loop. At the beginning, the apple came up too the display. But now only gong every 5 seconds! All my data are on the Mac. Shit

[mon2]

Re: MacBook A1707 820-00281 Boot Loop

See if you can locate someone with the Data Migration Tool from Apple. There is a connector onboard the logic board that can be used to extract your data off the soldered devices.

From last review, believe the SSD is a PCIe interface and you will be lifting a shorting cap and then using this external tool to get to your data.

Confirm it but the tool should be compatible with your logic board:

https://www.ebay.com/itm/28298966413...4AAOSwJqNbEE3D

[mon2]

Re: MacBook A1707 820-00281 Boot Loop

See here:

https://boards.rossmanngroup.com/thr...ootloop.61491/

Power down and locate J9600 (LIFEBOAT) connector. It is the shorting block connector that will allow you to disconnect the SSD from the CPU.

With the J9600 shorting cap OFF, does your system boot to the flashing '?' graphic rather than logo boot cycling ?

[Strolch]

Re: MacBook A1707 820-00281 Boot Loop

oh thx i will try!

[Strolch]

Re: MacBook A1707 820-00281 Boot Loop

No it stays dark. and on the external monitor I see that the monitor is addressed. But nothing happens. External SSD is also not addressed. Only the LED of the SSD adapter lights up. But it doesn't blink that the SSD is being addressed. and I can sometimes hear a crackling sound through the speakers every 5 seconds.