[SOLVED]Macbook pro 820 3787 A , no Backlight

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Noguinfor

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Hey guys,

this board had a liquid damage close to Q7706. the machine has a good start, but i don't have image and backlight.

missing 5V on L8300 ... were should i look?
 

Noguinfor

New member
U8300 = (LCD_PWR_EN = 3.4V, VIN_1 = 5v, VOUT_1 = Start 1.1V and goes to 5V Gradually, Without screen plugged. i take L8300 and VOUT_1 steel the same.. Bad U8300 or capacitors? ??

SMC_LID = 3.4V ..
 

Noguinfor

New member
Ya Duke, bad U8300.. i have now clean 5v.. but missing 12.4v pin 6,5,2,1 ... I have 12.4v in pin 3 and 4 !! i saw a post off rossman and he say is normal, because is a fet channel P .. Were i look?
 

Noguinfor

New member
Ya work's fine .. i think, the screen need plugged in to Q7706 work correctly. you can close the post .. Thank you one more time
 
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