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  1. S

    [SOLVED]820-2850 no backlight only 24v on PPVOUT_S0_LCDBKLT

    don't know whats happen here but i took bigger fuse is normaly original on board and now is working :) i have 33.45v on backlight output now :) thx for help
  2. S

    820-2850 dim green light on charger no powering up

    ADAPTER_SENSE when i connect 18.5v charger is : 2.89v
  3. S

    [SOLVED]820-2850 no backlight only 24v on PPVOUT_S0_LCDBKLT

    done PRAM reset and BKL_PWM is 2.42v on pin 2 U9701
  4. S

    820-2850 dim green light on charger no powering up

    ok. i removed and clean dcin connector and bridged pin 5 dcin to u6900 pin 5 and now i have green light on charger but when i connect 16.5v charger. when i connect 18.5v no green light :( very strange situation
  5. S

    [SOLVED]820-2850 no backlight only 24v on PPVOUT_S0_LCDBKLT

    hi guys. i have board 820-2850 with no backlight. voltage checked: BKLT_EN : pin 4 3.12v (is that a problem?) PP5V_S0: pin 23 4.95v d9701: pin 1 12.61v pin 2 24v not sure what i need to check more. still learning anybody can help. its emergency job !!! :)
  6. S

    820-2850 dim green light on charger no powering up

    corrosion was next to lvds connector and i replaced for new one. i try 3 different magsafe boards but still no luck
  7. S

    820-2850 dim green light on charger no powering up

    i have board with was water damaged. replaced few components with was look bad but still no sign of life.: PPBUS_G3H : 12.6v PPDCIN_G3H :16.37v PP3V42_G3H :3.41v SMC_BC_ACOK_VCC: 3.42v ADAPTER_SENSE: 3.42v any idea why light is so dim and no power up ?
  8. S

    [SOLVED]820-2850-a no green light on charger no powering up.

    ok. i done jumper from pin 5 on magsafe connector to u6900 pin 5 and now motherboard is working :) thx for all guys . all of you give me little bit to think how is it work and now is powering up. Done!!!
  9. S

    [SOLVED]820-2850-a no green light on charger no powering up.

    u6901 pin 5 : 3.42v u6901 pin 4 :3.40v u6900 pin 4: 3.41v
  10. S

    [SOLVED]820-2850-a no green light on charger no powering up.

    i measure on testing point next to charger connector on main board. but when i measure on pin 5 on magsafe connector is 0.42v
  11. S

    [SOLVED]820-2850-a no green light on charger no powering up.

    ADAPTER_SENSE : 18.80v SMC_BC_ACOK :3.2v SMC_BC_ACOK_VCC :0.00v checkedf with another magsafe board and is this same
  12. S

    [SOLVED]820-2850-a no green light on charger no powering up.

    Strange situation here. 820-2850-a no powering up no green light on charger. checked voltage: PPBUS_G3H: 12.64v PPBUS_CPU_IMVP_ISNS: 12.63v PPDCIN_G3H: 18.99v PP3V42_G3H: 3.41v PP5V_S5: 4.99v PP5V_S3: 0.00v
  13. S

    [SOLVED]820-3115-b powering up with green light on charger then turning of after 5 second

    also there is new sympton. there is no green light on charger after when board was turning self of but if i power it up fan will spin for 5 seconds and stop spinning.
  14. S

    [SOLVED]820-3115-b powering up with green light on charger then turning of after 5 second

    keyboard disconnected. board is on the table. PPBUS_G3H -12.62v SMC_ONOFF -3.49v
  15. S

    [SOLVED]820-3115-b powering up with green light on charger then turning of after 5 second

    [SOLVED]820-3115-b powering up with green light on charger then turning of after 5 second 820-3115-b powering up with green light on charger then turning of after 5 second and green light going of. any idea?then when i disconnect and connect again green light coming on and powering up and do...
  16. S

    820-3115-b green light pulsing and not powering up

    when battery is connected is showing red light so is charging
  17. S

    820-3115-b green light pulsing and not powering up

    ok voltage: 3v42= 3.44 ppbus_g3h = 12.62v SMC_BC_ACOK= 3.3v i left board diconnected for we while and connect it again and powered up. and i reconected and connect again and is dead now. must be some capacitor faulty i dont know :(
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