Booting ERROR (boots from xternal)
the device boots fine from the external HDD,yet when i use the cable on mother board starts giving question mark/prohibitory and apple logo(keeps cycling over those three signs.
device reads the HDD repair says fine verified already put new OS done,reset vram done.
almost done every thing .
changed 2 cables TBH one reads but gives question mark the other one gives this sign,original also gives the question mark and no HDD comes up in disk utilities
Update (02/24/2019)
Okay guys the problem was fixed :
its was the HDD cable+os recovery corrupted
Is dit een goede vraag?
What cables are you talking about? The Retina uses a flash drive.
door mayer
What is you exact model? Do you really have the older Unibody system not a retina model.
door Dan