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Have a 820-3462 card that i have change the smc on for some months ago. One day when i was surfing on it, it just shut down and nevere started again. I replace a condensator so now fan is spinning... but it's a lot more problems like, no pictures on screen, no chime, no backlight and it is...

*delete_this*

New keyboard?

https://eshop.macsales.com/item/OWC/DIDIMACHDD11/

Case solved

update: Have the happy apple startup chime (Y) and pictures on screen just missing the back light. pin 21/22 (j9000) only give me 12,5V (LED driver allready replace was the second thing aftrer replacing lvds connector)

PP0V75_S0_DDRVTT i now have 0.75V on and on CPU Vcore i have 0.77V

have replace 7402 and have the right ohm (90,6K) and have 3.31V PLT_RESET_L no chime and no screen

I understand. The resistor is pretty fucked up :)

Sorry my fault. It is 6.44M ohm booth side

Think maybe the cpu ton resistor is fucked up. in diode mode i get 5,82M ohm (red on ground)

on q3210 pin5 0,0V

Have a liquid damage board here that stay in s0 mode. i`m missing PP0V75_S0_DDRVITT on u7300 measuring volts: Pin 1) 0V Pin 2 1,5V Pin 3) 0V Pin 5) 0,75V Pin 6) 1,79V Pin 8) 1,49V Pin 9) 1,52V Pin 11) 0,10V pin12) 5,05V pin 13) 1,50V pin14) 1,50V pin15) 6,55V pin16) 3,32V pin17) 0V pin18)...

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Thank you XooP. will remove R4830 and check. report after

C8000 give me 3.3V and R8000 give me 2.13V

Could it bee a bad chip between this? Bade trace? Should i run a wire from r8050 too r4830?

R8050 Pin 1 give 3,34V and 0.2Ω R5294 Pin 1 give 3.41V

Have this Macbook air 820-3437 with no working keyboard and trackpad. board is light liquid damage. Have tray a know good trackpad, keyboard and cable but still not working. measurement on j4800: Pin 19: 3,4V Pin 14: 5,15V Pin 10: 2,13V R4830 2.09V and 0,1Ω diode mode give 0.367 Have test...

I hade the same problem with a3115 card and change the lvds connector after that i got pictures