(347) 552-2258 [email protected]

Search results

  1. Y

    820-00239 dead ppbus cycling.

    any pointer?
  2. Y

    820-00239 dead ppbus cycling.

    while checking that, somehow mac improve itself.. voltage now is stuck at 20v 0.26amp, trackpad can click, but no brain pm_slp_s4_l is 3.3v ppvccsa_s0_cpu 1.05v ppvcc_s0_cpu 0v. pp5v_s0 5v pp3v3_s0 3.3v all_sys_pwrgd 3.3v
  3. Y

    820-00239 intermittent ssd not detected.

    can i swap the ssd controller, rom and etc ? in case data isnt a problem ?
  4. Y

    820-00239 dead ppbus cycling.

    do you do this to make sure board receive signa to turn on ? voltage 3.3v, when onoff shorted, pm_pwrbtn_l drop to 0.3v..
  5. Y

    820-00239 dead ppbus cycling.

    ok somehow ppbus isnt cycling anymore, but voltage doesnt go past s5. ppbus_g3h 13v pp5v_s5 5v pp3v3_s5 3.3v pp3v3_sus 3.3v s5_pwrgd 3.1v pp5v_s4 0v pm_slp_s5_l 0v p5vs4_en 0v
  6. Y

    820-00239 dead ppbus cycling.

    l7410 L7420 and l7430 is 2.5 ohm, is that normal? Other than that, theres no short on any other coil.
  7. Y

    820-00239 dead ppbus cycling.

    ppbus isnt shorted on either side, and has diode mode of 0.400 with fuse attached.
  8. Y

    820-00239 dead ppbus cycling.

    Hi, this board came in dead. board pristine, just a bit of dust. when magsafe plugged in, its taking 20v 0.03Amp which cycle to 0 amp every few sec. ppbus_g3h is around 3.8v, but every few second cycling to 13v for a split second then back to 3.8v is this some kind of mosfet or u7000 problem ...
  9. Y

    820-00239 intermittent ssd not detected.

    l9300 and l9320 both at 0.9v j6900 pin 4 1.7v 6 100mv 8 3.2v
  10. Y

    820-2879b dead no pm_slp_s4_lg

    both present at 3.3v, stable.
  11. Y

    820-2879b dead no pm_slp_s4_lg

    yes i did, 0v, after triggering smc_on_off_l, still flat 0v no twitch at all. rtc_rst_l : 3.2v smc_g3h_poweron_l 0v sm_intruder_l 3.3v 0.9v present at both side of L7750.
  12. Y

    820-00239 intermittent ssd not detected.

    11 3.08v 12 3.1v 13 90mv 14 91mv i would sayvoltage looks good. should i replace picolo ?
  13. Y

    820-2879b dead no pm_slp_s4_lg

    hi this board came in dead, whole board lookin pristine, ppbus_g3h 12.6v pp3v42_g3h 3.42v ( 50k resistance to ground) pp3v3_s5 3.3v pp5v_s3 0v smc_pm_g2_en 3.3v pm_slp_S4_l 0v, (with power button shorted) is this dead mcp ?
  14. Y

    820-00239 intermittent ssd not detected.

    for the lifeboat connector voltage yeah, i dont use the lifeboat. ok i will redo measurement
  15. Y

    820-2936 dead

    yeah all that testing is motherboard alone, nothing connected. if its ram slot, could it still be replaced? any other possibility maybe
  16. Y

    820-2936 dead

    so this macbook came in a while ago, for ram upgrade. the top slot has broken plastic hinge so only the closest one to the trackpad is maxed out. without ram, mac fan will spin forever, ppvcore_s0_cpu is 1.1v but if i insert ram, mac's fan will loop every few second, any idea what causing this ...
  17. Y

    820-00239 intermittent ssd not detected.

    another lifeboat connector doesnt help. im making measurement with lifeboat connector off btw.
  18. Y

    820-00239 intermittent ssd not detected.

    stable 3.0v and 3.2v
  19. Y

    820-00239 intermittent ssd not detected.

    j9600 cleaned: pin12 not stable, cycling around 2,6v to 1.3v to 0.4v,and back to 2.6v pin 14 : cycling from 1.3v to 0.4v, back to 1.3v again. still folder ?
  20. Y

    820-00239 intermittent ssd not detected.

    Hi, this board came in with folder ? disk utility doesnt show internal ssd,but sometimes laptop will boot. i heard bad u9300, low battery will cause no ssd, but i charge it fully, still folder ? pp1v2_ssd_hot 1.2v pp3v3_s5_ssd 3.3v pp3v3_2v7_nand_vcc = 2.67v pp1v8_ssd_cold 1.8v pp2v7_nand_pvcc...
Top