820-2530 no wifi.

BCN_Techs

Member
Have this board and first it was L3404 and bad airport card ( in display). CHanged both and it work for 5 minutes. Thans burn L3404 again. CHanges L3404 again ( 3 times for now) and also Q3450 but every time i boot mac coil is burning.
 

2informaticos

Administrator
Staff member
Or airport card.
Disconnect the other end of cable and see if short is gone.

"There is no short now. But in diode mode (red to ground) both pins are 0."
I cannot really understand this...
 

BCN_Techs

Member
Wit airport disconected still shorted. Changed whole flex from camera and airport to logic board, Changed L3404 again. Before boot checked and with cable conected there were no short on pin 2. Once connected L3404 burn again and short appear like previous cable. If connected J3401 short is present, if not, not present.
 

2informaticos

Administrator
Staff member
Cover connector pins from MLB with kapton tape; or ripp off the black (CONDUCTIVE) sponge!
If still short after, change the cable...
 
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