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  1. R

    [SOLVED]Backlight 820-3208

    Liquid spill on this board, i change R9731 & R9715, i have BKL_EN=2,7V PPBUS_S0_LCDBKLT_FUSED=8,35V PPVOUT_SW_LCDBKLT=8,35V i remove C9796 look bad, is it necessary? is it U9701, i don't see more damaged components the board work well on external display.
  2. R

    820-2850 no backlight

    I try with a good LCD and i have always PPBUS_S0_LCDBKLT_PWR=0,3V
  3. R

    820-2850 no backlight

    Ok i have really a short in the LCD, i change Q8608 again and i have BCKLIGT_EN_DIV= 12,08V and LCD_BCKLT_FUSED= 12,50V PPBUS_S0_LCDBKLT_PWR=0,806V i don't understand why, the screen is not plug, the impedance of PPBUS_S0_LCDBKLT_PWR is 3K7 ohm.
  4. R

    iPad air 2, red screen

    sorry i'm not on the good forum :(. you can close
  5. R

    iPad air 2, red screen

    I have an ipad air 2 who make red screen after reboot like iPhone 5s. I try to remove camera both, nothing change. I can't restore it because the screen come red in restore. Do you have an idea please? thanks
  6. R

    820-2850 no backlight

    Liquid spill on the board near U9000 i clean the board with ultrasonic, i remake solder of U9000. I change the fuse F9800 and Q8608, but always no backlight. i check the connector of lcd for short, but i don't see anything. Q8606 and F9800 are dead when i plug the screen. can you help me please...
  7. R

    820-3115 no backlight

    ok i understand. i find Q9706 pin 3,4 in short with the other pin, not to GND. i remove Q9706 but same problem. PPVCORE_S0_CPU = 1,159V
  8. R

    820-2936 led green not always

    C7005 move between 2,4V and 2,6V 17/18 = 3ohm 27/28 = 20ohm I found the problem, i change R7005 10kohm instead of 20ohm, now the green led work. thanks for your help
  9. R

    820-3115 no backlight

    i can't, it's strange today i can't start the board, i push on button the led white in front light but no sound of superdrive, no boot i don't understand, fan spin always. what is need for a board make a boot?
  10. R

    820-2936 led green not always

    ADPATER_SENSE=0V SYS_ONEWIRE=0V SMC_AOK=0V often
  11. R

    820-3115 no backlight

    BKL_PWM=1,327V and SMC_LID=3,471V
  12. R

    820-2936 led green not always

    Hi, it's difficult to have the green led on this board (is very low light green) sometimes work. the board work with an full charge battery, the battery indicator working, no liquid, i try new magsafe board 820-2565, same issue. when i have not green led: PPBUS 12,14V SMC_PM_G2_EN = 3,491V...
  13. R

    820-3115 no backlight

    PPVOUT_SW_LCDBKLT=25V BKL_EN=3,112V i change before Q9706 because PPBUS_SW_LCDBKLT_PWR=0 now it's 12V
  14. R

    820-3437 fan 5 sec and shutdown

    no just stay off, if i want to restart the board i need to short the power pad.
  15. R

    820-3437 fan 5 sec and shutdown

    i have in fact the clock in pin 12 32Khz and always on but the board start and shutdown. i can't find where is the problem?
  16. R

    820-3437 fan 5 sec and shutdown

    I inspect all the board under microscope, i put the board in ultrasound cleaner, the board is clean, no corrosion on the board. i check with scope the signal Y1905 ok i have SYSCLK_CLK25M_X2 at 25mhz but nothing in output of U1900, all PP3V42_G3H=PP3V3_S5=PP3V3_S5RS3RS0_SYSCLKGEN=3,34V during my...
  17. R

    820-3437 fan 5 sec and shutdown

    ALL_SYS_PWRGD climb to 3,34 and fall at 0V. i disconnect keyboard, only magsafe board with cable left board and power adapter.
  18. R

    820-3437 fan 5 sec and shutdown

    Corrosion near Q8150 is it cause my problem? thanks
  19. R

    820-3437 fan 5 sec and shutdown

    when you say VCORE, is it PPVCC_S0_CPU = 1,74V and fall when fan stop. The led is orange without battery
  20. R

    820-3437 fan 5 sec and shutdown

    I check tomorow for the Vcore but no shutdown and stay off, but when i short power pad, he start again.
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