[SOLVED] 820-3435 No video but backlight

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raainxx

Member
Hi,
i have this macbook air with problem on the display (external & internal) black screen no image but i see the backlight.
I have chime on start, fan turn, no liquid spill on the board very clean.
I check PP3_V3S0SW_LCD_UF=3,35V , PPHV_S0SW_LCDBKLT=22V.
i check resistor near lcd connector, all is good.
I don't know where check?
thanks
 

raainxx

Member
without ssd and alt button press, always nothing on the screen, i make PRAM same issue. I wait 2 minute too same.
 

raainxx

Member
Ok now with your rom, i have LCD without SSD but with black screen.
i don't understand before, i'm sure i test without ssd.
Do you have a method to program the bios without remove component?
i try to restore the old bios?
thanks
 

raainxx

Member
yes, i press alt i can see the wifi selector.
Do you have a method to program the bios without remove component?
i try to restore the old bios?
 

dukefawks

Administrator
Only if you have a special connector which you don't, so just pull the chip again. Upload the original dump here to be fixed.
 

raainxx

Member
No Title

i reprogram the bios with the original dump, now work with a new ssd :(.
But the fan go full speed. i have an error on the fin stack sensor, where is this sensor?
 

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