820-3209 no SSD

ajdoc

New member
820-3209 after liquid damage.
Question mark folder.
SSD tested on other MBA and works fine.
Tested with SSD from another MBA and still same issue.

PP3V3_S0_SSD_FLT 3.34V
SSD_RESET_L 3.34V
SATA_PCIE_SEL 3.28V
U4510 pin 1 3.34V
R4520 3.34V

P1 / P2
C4510 0.763 0.299
C4511 0.763 0.299
C4512 0.763 0.323
C4513 0.763 0.323
C4514 0.763 0.295
C4515 0.763 0.295
C4516 0.763 0.295
C4517 0.763 0.295
C4518 0.763 0.295


Any ideas?
 

ajdoc

New member
Some other shop tried ti fix liquid damage - cant see any signs of liquid on the board.

Checked connector and looks OK, all voltages looks good as well on connector.
 

dukefawks

Administrator
There is more than just voltages to the connector. Diode mode on data pins, also capacitors from connector to U4520.
 

ajdoc

New member
Diode mode on J4501
1, 2, 25, 26 0.306V
4 0.297V
5 0.300V
7 0.770V
8 0.769V
10 .0L
11 .0L
13 0.769V
14 0.769V
16 0.356V
17 0.356V
19 0.490V
20 0.563V
21 0.756V
22 0.728V
23 0.728V
24 0.458V


Cant find U4520 on this board.
 
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