Hi. Have an A1466 820-0165-A with a black screen. Attached magsafe charger, the light goes green. No fan spin.
See 8v6 rail; 3v3 rail; no 5v0 (7A) rail. Many other rails also missing.
Proceeded to remove wifi; SSD cards - no difference.
Then proceeded to remove the flat cable between the audio board (820-3455-A) and the main logic board. Bingo! Fan spin.
Proceeded to add back the SSD & wifi card - still ok on fan spin.
Attached the lvds cable - have video and the macbook booted to the desktop.
If we attach the audio board with the flex connector - the system acts dead again.
The trackpad had some hints of liquid damage - cleaned with alcohol and appears to work ok. The power button is still not working correctly from what we can tell. Need to check online videos but is this keyboard with rivets? Will study the schematics on how the on/off power button functions.
Are the audio boards serviceable? See some potted parts on this tiny board (has the magsafe + USB + audio jack + audio codec?).
They are pretty pricey on the websites.
Welcome any suggestions.
See 8v6 rail; 3v3 rail; no 5v0 (7A) rail. Many other rails also missing.
Proceeded to remove wifi; SSD cards - no difference.
Then proceeded to remove the flat cable between the audio board (820-3455-A) and the main logic board. Bingo! Fan spin.
Proceeded to add back the SSD & wifi card - still ok on fan spin.
Attached the lvds cable - have video and the macbook booted to the desktop.
If we attach the audio board with the flex connector - the system acts dead again.
The trackpad had some hints of liquid damage - cleaned with alcohol and appears to work ok. The power button is still not working correctly from what we can tell. Need to check online videos but is this keyboard with rivets? Will study the schematics on how the on/off power button functions.
Are the audio boards serviceable? See some potted parts on this tiny board (has the magsafe + USB + audio jack + audio codec?).
They are pretty pricey on the websites.
Welcome any suggestions.
Comment