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  1. Y

    820-2850 not going to sleep when closing lid.

    this board came in with classic c9560 problem ( crashing intermittently ). after c9560 problem, customer came a few weeks later with not going to sleep when closing the lid problem. smc_lid is 3.4v. using another known good logicboard in the case, the sleep work, so we can discard part problem...
  2. Y

    820-00239 not waking up from sleep.

    hi, thanks, the solution worked! but just curious, its like a board layer problem is it ?
  3. Y

    820-00239 not waking up from sleep.

    if J5260 is removed, smc_lid_right is 1v..
  4. Y

    820-00239 not waking up from sleep.

    smc replaced, smc_lid_right still 0v. problem still persist
  5. Y

    820-00239 not waking up from sleep.

    hall sensor chip has continuity to u5255. any chance smc pulled down smc_lid_right ?
  6. Y

    820-00239 not waking up from sleep.

    the connector with the component on top of it..
  7. Y

    820-00239 not waking up from sleep.

    yes, i have replaced the J5260 with its entire building, but smc lid right still 0v..
  8. Y

    820-00239 not waking up from sleep.

    hi, this board came in, not waking up from sleep. if i sleep the mac without closing the lid ( from apple logo top left corner, sleep ) , i can wake it from sleep. but if i close the lid, opening the lid wont wake up the mac. when screen is on, smc_lid 3.3v smc_lid_r 3.3v smc_lid_left 3.3v...
  9. Y

    820-3024 u6100 shorted.

    theres no beeping sound, i use the charging port + the cable bridge too.
  10. Y

    820-3024 u6100 shorted.

    ok.. but still no usb activity, so i dont need trackpad too test right.. i tried to reflow each ram, but still no avail..
  11. Y

    820-01987 stuck 5v.

    clarify. IF mac is turned on, both port behave the same. 5v 0 amp. but if i test board alone without battery, both port consume 0.25amp to zero amp but the port associated with u3100 is looping every 5 second. the port associated with u3200 isnt looping at all. from my expereince, the non...
  12. Y

    820-01987 stuck 5v.

    forget to update here, so the board actually turn on, but there's no backlight. i found a short caps at ppvout, and mac turn on. unfortunately customer forget password so i have to reinstall, but its not charging and not detecting usb. tested with another usb c port still the same, so not part...
  13. Y

    820-3024 u6100 shorted.

    i tried first file, its not quarter fan spinning anymore, but still no usb activity. i tried the second file, and clean me with medusa. its not quarter fan spinning, but i get fan spin that start normal, and later will blow faster. no usb activity, i got 1.1v at ppvcore_s0_cpu.. my brain just...
  14. Y

    820-3024 u6100 shorted.

    hi, this board came in with mild liquid damage around u5510. its quarter fan spinning. even after clean and replace u5510 still quarter spinning. then with thermal cam i found that pp3v3_s5 is shorted at u6100. removing u6100 relieve the short. anyone have the bios clean file for this board ...
  15. Y

    820-01987 stuck 5v.

    this board came in. customer say its been dropped. board looks clean. when plugged to charger, its taking only 5v 0 amp. ppbus is shorted at c9081 ( im using 820-01598boardview ). now its 5v and cycling from 0 to 250amp. but only one port will restart. the other board also cycling amp...
  16. Y

    820-2936 smc_bc_acok high.

    hi, this board came in with intermittent green light. ppbus is 12.6v solid. pp3v42 : 3.42v i notice that I dont have smc bc acok when the green light is out. I change isl, and then i got a fairly consistent green light. when magsafe is plugged in, i got fan spin. but theres no usb activity ( no...
  17. Y

    820-3435 fan spin, no vcore, no all_sys_pwrgd

    hi, this board came in with corrosion on the ram, i reball the ram, and macbook work good, for 1 day. fan will spin, but vcore is 0v, cpu is not heating up too ( normal ), all_Sys_pwrgd is 0v. then i measure that pp1v8_s3 is 3.3v. pp1v2_S3 is 1.2v ( normal). I am sure the ram i reball is good...
  18. Y

    i see, thanks for the info, i will try and update to you soon

    i see, thanks for the info, i will try and update to you soon
  19. Y

    820-01041 nand shorted to ground

    hi, this board came in dead at 5v 0amp, a bit of water dmg around u9080 i see that pp3v3_G3h is shorted at u9080, removing u9080, and i got 20v and a bit of fluctuating amp. i see that pp2v5 is shorted to ground 0 ohm. I inject 1v and found U8800 is heating up. removing u8800 and short pp2v5 is...
  20. Y

    820-2936 NO GREEN LIGHT

    just curious, but if i jump r5087, i have green light, board turn on and post. but better take care of this the proper way.
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