It does boot sometimes, but only after hanging for way longer than is normal for a A1398 of this vintage to come to the logo. Half of the times I try to boot it just gives me the question mark folder! I tried the usual SMC and PRAM resets, and I ran First Aid when the machine did decide to boot, but first Aid did not repair anything on the SSD, but came back with SSD is OK. I booted of external drive, and it did boot then.I reseated the SSD, looked at the connection under the scope. Looking clean.I switched to another known good SSD blade, same issue. I tied Safe Mode, but it hangs at login screen, lets me type my password but then nothing. Ran ASD EFI , came out fine. Tried to run ASD OS, hangs. Will boot after a PRAM reset, but then the next boot again, just the folder! Anyone have any clues where to even start?
Early 2013 15"MBP Slow boot, and 50% of the time will show question mark folder
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Re: Early 2013 15"MBP Slow boot, and 50% of the time will show question mark folder
No cable on that model.Comment
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Re: Early 2013 15"MBP Slow boot, and 50% of the time will show question mark folder
History? Liquid damage? Discrete graphics or Integrated graphics model?
Stoppped booting from external drive as well or I misunderstood?
Happened after an update? Someone messed with EFI?
Just to rule that out I'd try to flash the EFI with a known good dump and (properly) cleaned ME region.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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