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no no its bizarre i know. mac will turn on with battery connected, and run off battery. BUT if I attach charger to it and then rip it out, mac will shut down.

this mac came dead, previously worked on other store, replace u7000 cause its ugly as f, with blown r7021, r7022, and r7025 out of value, r7001 out of value, all replaced, value good.| now mac will turn on, see battery, can charge the battery. but unplugging magsafe will shutdown the mac. but...

my bad, i use bo3 version instead of c00, replaced both of them, and all 4 can switch to 20v and its charging now, thanks a lot!

no, board only turn on with battery. if without battery, all 4port behave the same. only stuck at 5v 0.26amp..

hi, this came in with iquid damage at u3200 and u3100 area.. i replaced both u3200 and u3100, now board will turn on, run off battery, but not charging at all port. i measure that ub300 and ub400 got pp1v1 when plugged in to their corresponding port, but u3100 and u3200 doesnt get any pp1v1 at...

hi, can I used this tbtrom for 820-00875-01 ?

smc bypass always boot fine. anyway, the problem was smc_lid_right. i replace the 3 leg ic at J5260 that doesnt produce hall_sensor_right, and mac boot up fine now. i thought smc_lid missing only dim the display but still produce usb activity ? ( this is solved, but just curious.. )

hi, this board came in with a bit of liquid damage at ub400 and ub300, both of these corresponding port will stay on, while the other two looping. i replaced both ub400 and ub300, and i got 20v on all port now. i tested it in chassis and it did boot. i leave it one day, and next day it doesnt...

hi, this board came in with a bit of liquid damge at smc and y5010. smc and y5010 has been replaced. the problem is no post, usb activity is missing, fan will spin faster and then died, and start again ( loop ). if ram is removed, board stay on, theres a beep sound every 3 second. tested with...

hi, this mac came in stuck at apple logo screen. sparepart problem has been eliminated, its logicboard problem. u6100 looks like its have been replaced by previous tech, but im not sure about the bios file they use. the google drive link you share for this 820-3024 at other post is dead now...

pp20v_usbc_xb_vbus diode mode is 0.140 pp20v_usbc_xa_vbus 0.140 usbc_xa_cc1 0.580 usbc_xb_cc 0.585 usbc_xa_cc2 0.580 usbc_xb_cc2 0.586 doesnt see any component on these cc line, its directly connected to cd3217 which i have replaced.. continuity is good at every probe point to another.. any...

both cd3217 has been replaced with new one, but still exact symtomps.. to sum up, macbook still alive with battery. without battery, top port doesnt respond to magsafe at all. bottom port is 5v from 0-0.26amp then loop.. any pointeR ?

yeah, im ordering new chip to make sure, im not sure mines known good.. will update after replacing both chip again, thanks for the guidance!

r7020 got continuity to both cd3217 fuse. about pp20v_usbc_xb_vbus, i dont see any fuse there. but it does have continuity from the port to u3200 and its nearby component

when i test again, the top port that correspond to u3200 doesnt respond to ahmeter, even without battery. the bottom port still loop. pp20v_usbc_xb_vbus 0.93 usbc_xb_cc1 0.498 usbc_xb_cc2 0.496 usbc_xa_cc2 0.530 usbc_xa_cc1 0.530

i compare the diode mode reading between port fpc, both port measure the same ( i compare the counterpart of the same line ). i notice a chipped dz3302. but the line itself isnt shorted. any chance its from u2800 ?

i have replaced both cd, one by one and test the symptom, but still same. i have ruled out charging port aswell.

this device got liquid damaged, shorted ppvin_p3v3hrtc_r, replacing u6903 relieve the short. both port is 5v loop but mac turn on withbattery. but usb c cannot be used to charge or detect usb drive. i notice, if battery is connected. one port will have 5v 0amp, while the other port wont even...

r6961 is good, there's 3.3v at both side.

r8750 is corroded, re tin the resistor, value is normal. but still same.