Diagnosis for A1267 Cinema Display with no USB but working MagSafe
So here is the rundown:
I got this display on Craigslist for cheap.
When plugging in, it supplies my 2011 MBA power via MagSafe but:
-The panel shows no signs of life
-System Report on the MBA doesn't register any external USB or iSight devices
When opened, the power supply has some residue on the front of the board.
Going through the deep dive for Dead Unit/No Power in Apple's technician PDF:
2. No, unless somehow the MBA 2011 11" isnt a 'supported system'
3. No voltage on TP11
4. No voltage on TP61
9. No voltage on TP61 or TP13
Conclusion: Replace logic board
So even though there is some residue on the power supply board, there still seems to be issues with the logic board.
When I unplug the 7 pin power connector from the logic board, it has these voltages from left to right, 0 - 7:
1. Nothing: zero volts to anything else
3. 6V to GND
4. 6V to GND
5. 6V to GND
6. 30V to GND
7. 30V to GND
I am left thinking that my Logic Board needs some help..
Please let me know anything else I can post to help with a solution
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