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  1. S

    [SOLVED]how to check with gpu need to be used on board when number is wiped?

    i have motherboard where gpu number is wiped and i want to replace for new one but half numbers are wiped. how do i check with one is correct one? board 820-2915-a serial: c2qhk008drjd emc 2417
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    820-2838-a problem with powering up. fan spin for 1 second and stop

    is this voltage should be show when computer is of? PP3V3_S3_FET also i have missing PP5V_S3_REG
  3. S

    820-2838-a problem with powering up. fan spin for 1 second and stop

    ALL_SYS_PWRGD no voltage at all
  4. S

    820-2838-a problem with powering up. fan spin for 1 second and stop

    no vcore voltage
  5. S

    820-2838-a problem with powering up. fan spin for 1 second and stop

    i checked straight away that first and is ok : ppbus_g3h -8.43v resistance also good pin 27-28: 20.5ohm and 17-18: 3.1ohm
  6. S

    820-2838-a problem with powering up. fan spin for 1 second and stop

    I have 820-2838-a board with problem. when i press power button fan spin for second and stop after nothing happen. any idea? aha. i bought this laptop with faulty magsafe. when i got it there was no green light on charger. i replaced macsafe board and now i have green light
  7. S

    [SOLVED]820-2936-b fan start spin then stop every 1 second

    ok. i replaced system clock chip u2800 and now is working. thanks very much. great job m8
  8. S

    [SOLVED]820-2936-b fan start spin then stop every 1 second

    Hi. I have strange problem with board 820-2936-b. When i connect charger to the board fan is start spin for 1 second and stop. then do this same non stop. any idea?
  9. S

    [SOLVED]820-3115-b works from charger but no working from battery

    found problem it was Q5490. replaced and working now
  10. S

    [SOLVED]820-3115-b works from charger but no working from battery

    battery full charged brand new f7040 pin 1 and 2 12,53v
  11. S

    [SOLVED]820-3115-b works from charger but no working from battery

    Hi. Long time i was not here. So i have here water damaged 820-3115-b board with was totaly dead. i manage to fix to state where is powering up and charging battery but when i disconnect power cable laptop is turning self of i checked voltage on battery connector and battery is charged. When i...
  12. S

    820-2915-b no picture but sound coming out from speakers

    i mean i replaced gpu
  13. S

    820-2915-b no picture but sound coming out from speakers

    Hi. i got 820-2915-b board where was problem with display like always in 2011 15 inch macs. i replaced 3 chipsets but now is no picture at all but i can hear sound on start up. checked two working screens and is not that. also is not a backlight for sure, i checked with lamp. any idea where to...
  14. S

    [SOLVED]820-3115 no picture no back light no sound

    i just put in scrap . to much time spend on it lol
  15. S

    [SOLVED]820-3115 no picture no back light no sound

    so is anything i can check more to fix it? must be repairable.
  16. S

    [SOLVED]820-3115 no picture no back light no sound

    i put another smc and nothing
  17. S

    [SOLVED]820-3115 no picture no back light no sound

    i flashed BIOS and now i will try to do smc. see if it works
  18. S

    [SOLVED]820-3115 no picture no back light no sound

    there was liquid damaged but i bought this board from ebay and i dont really know whats happen with this board. i see somebody try to do smc all ready and back light and few more components so not sure if is worth to spend time on it. you know what is like fixing board after somebody try to fix...
  19. S

    [SOLVED]820-3115 no picture no back light no sound

    fan spin ok. PPVCORE_S0_CPU 1.11v
  20. S

    [SOLVED]820-3115 no picture no back light no sound

    Got problem with board. Looks like cpu maybe faulty but will ask for opinion b4 i will put in in scrap. R7402 : pin 2- 12.58v pin 1- 0,63v R7403 pin 2 -12.58 pin 1- 0,58v U7400 : pin 46- 5,03v U7400 : pin 47 -3,3v what should i check next?
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