820-2610 no WIFI

[dudipupan]

Good evening,

i have a problem with a 17" MBP from 2009 (810-2610).
WIFI is missing on this board (macOS shows "No hardware installed").
Everything else (camera, etc.) works fine.

PP5V_WLAN is present and the connector seems good.
I already tried a known good wifi-card.

 

[dudipupan]

And I already tried another screen in case the plug is faulty. But WIFI is still not detected...

 

[2informaticos]

Post MINI_RESET_CONN_L, MINI_CLKREQ_L and PCIE_MINI_PRSNT_L.
Check C3430/31 and L3401.

 

[dudipupan]

MINI_RESET_CONN_L and MINI_CLKREQ_L:3.3V
PCIE_MINI_PRSNT_L: 0V
C3430/31 are good and so is L3401 (0 ohm resistance between pins 1 and 2 and between 3 and 4 and also OL between pins 1 and 3).

 

[2informaticos]

"MINI_CLKREQ_L:3.3V"
This is not good.
Check MINI_CLKREQ_Q_L; should have 0V, when wifi is connected.

 

[dudipupan]

MINI_CLKREQ_Q_L is 2.5V

 

[dudipupan]

I changed L3404 now MINI_CLKREQ_L is low.
I don't know how i measured PP5V_WLAN 5v... maybe i measured PP5V_WLAN_F instead by taking the wrong pin of L3404...

 

[dudipupan]

WIFI is working now. Thank you for your help!