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A1466 Doesn't Boot - Stuck Apple Logo

M

mdc2018

Member
A1466 Doesn't Boot - Stuck Apple Logo

Cant get into recovery, bootable drives don't work ,

Tried multiple known good SSD's

Any idea?
 
M

mdc2018

Member
"Try ne BIOS, wirh clean ME."

I have not done this before -- is there a guide with the process that I can refer to? Quick google research I see I can access the bios by holding “Command,” “Option,” “0” and “F” on boot.
 
2informaticos

2informaticos

Administrator
Staff member
Means you need to remove SPI chip (U6100) and reprogram it with external programmer, like TL866, CH341, or similar.
I suppose you don't have Medusa 2, which can do all the job onboard...
 
M

mdc2018

Member
Should I get a Medusa 2?

More than happy to buy one if its a must have .. where do you recommend I order it from?
 
M

mdc2018

Member
Thank you.

One more question, can I replace the SPI chip (U6100) with one from a donor board? Would that work or are they somehow married to the logic board?
 
2informaticos

2informaticos

Administrator
Staff member
Usually serves for test.
But it will have "dirty" ME region, because comes from other board.
However this way cannot completely discard BIOS issue.
If board starts, 100% is BIOS.
If not, doesn't mean old BIOS is OK.
 
2informaticos

2informaticos

Administrator
Staff member
If it starts, don't even think to use it with that ME region.
You can swap your ME region on it.
As Fsys area and serial number too.
 
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