Hello. I have 820-2915 with no wifi (no hardware). I have already tested with known working card. Here are pin measurements from connector. L3404 is working and has been replaced just in case. Thank you. Have a good one.
pn 22 - 3.3V
pn 24 - 3.3V
pn 26 - 3.3V
pn 27 - 3.3V
pn 28 - 3.3V
pn 29 - 3.3V
pn 30 - 3.3V
pn 22 - 3.3V
pn 24 - 3.3V
pn 26 - 3.3V
pn 27 - 3.3V
pn 28 - 3.3V
pn 29 - 3.3V
pn 30 - 3.3V