questionmark on A1425 please help

[Dozer]

hi comunity.

I got a strange problem.

Got from customer an A1425 with blinking question mark

I pulled out a working 256GB SDD from a A1398 (2012) and insert that in the A1425. Everything is booting and working ok.

Now I take the "bad" 128GB SSD from the A1425 and insert it in the A1398 and there it works fine without problems

put it back in the A1425 again only the question mark

So what is here the problem, need some help please. going crazy.

 

[2informaticos]

What OSX has the "bad" SSD?
Could be an issue with APFS partition, if is not the original SSD from A1425, or board has been changed and BIOS doesn't support APFS yet.

 

[Dozer]

thanks. thats a posibility. on the "bad" SSD is installed Mojave

I cleaned the SSD and installed High Sierra, not working. Then i looked with the A1398 but the intallation process has format the SSd again with APFS before installing High Sierra

Ok, so I cleaned again and cloned my working Disk (High sierra without APFS) on the "bad" disk. Now that is working in the A1425

So is there any posibility to change the BIOS for support APFS? I am now shure the client was trying to install or to update the system. In the beginning holding Alt while starting ("bad" SSD in A1398) there was a bootable disk named installer to see.

 

[2informaticos]

Do fresh install of Mojave or High Sierra, in the board with problem.
BIOS will be automatically updated.

 

[Dozer]

yes, that worked, thanks a lot

[SOLVED]