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very strange for me. anyone have this problem?

before change bord all display's was working but there wasn't backlight.after board changes backlight fixed for all of them but every display have exactly same problem. please check photos

hello have 3 pcs display water damaged. 2 pcs A2337 display and 1 pcs A2338 all of them is good display just "display board" are damaged. i changed display board on all of them and all of them have same problem. soldering is 100% good. any experience ? https://files.fm/u/pbf96hp844

hello have in hand A2251 normally working but touch bar and hall sensor not working at all. tried other board in this macbook and touch bar and hall/lid close working. so it's 100% motherboard problem. how do you think touch bar not working because of amr sensors? i can't find in shematics any...

yes they are always there stable

hello 820-02020 5V 0.09a pp5vs2 missing p5vs2_en missing u8100 changed p.s sometimes have 20v but still low amp under 0.10a ( about 2 times happened during about 50 times try) what should i check?

hello.already tried repair by some other technician and changed/fixed some ic's. seems it was water damaged. as i see cd3217b13 is replaced by cd3217b12. is it normall?or should i buy 3217b13 and replace.

cleint said that his macbook not turning on. i left only macbook in office. not his charger

i don't have another 85w original magsafe 1 charger. is there any method to check possibility of charger problem? can i test by multimeter on the motherboard if charger is not enough for anything ?

yes i am using original 85w magsafe 1 charger. yes its not start even with both connected battery and charger.

during this state SMC_PBUS_VSENSE must be or not ? there is 0v SMC_DCIN_VSENSE have 2.7v SMC_CPU_VSENSE 0v SMC_GFX_VSENSE 0v SMC_GPU_ISENSE 0v SMC_GPU_VSENSE 0v SMC_CPUVCCIO_ISENSE 0v SMC_SA_ISENSE 0v SMC_P1V5S3_ISENSE 0v SMC_CPU_HI_ISENSE 0.6v SMC_GPU_HI_ISENSE 0.68v...

resistance between pins 17/18 is 3.6 ohm and voltage is 12.57v for chgr_cso_n and same 12.57v on chgr_cso_p 27/28 is 21.2 ohm and voltage is 16.v for both chgr_csin/p

yes its booted in smc bypass mode there is chime, apple logo, loading bar about 60% and than restart and same .... AVREF_SMC have 3.3v

no one can advice me what should i check in this situation?

how do you think is the PM_BATLOW_L problem?

hello. i have 820-2915 board. it doesn't have any visual damage. it doesn't have pp3v3_sus.PM_SLP_SUS_L present. please advice me from where should i start? in SMC_BYPASS mode it's started and presents PP3V3_SUS 3.3V! PM_SLP_SUS_L 3.3V PP3V3_SUS - 0V no short to ground...

finally i fixed this macbook A2159 820-01598. so reason of this problem was damaged one of the replaced nands. changed all of them second time and problem fixed. and about my question i checked only motherboard connected with charger and its restored. so its possible to restore without...

for example if you will change nand on ipad/iphone it will stuck in dfu mode and for restore battery/power supply must be connected and dock/port of course. no need anything else for restore. i dont know it about macbook. macbook also need battery connected or charger is enough for dfu restore...

maybe you don't understand what i asked.sorry for my bad english. please read once again what i wrote. thanks 2 informaticos for your effort. you are great man

i want to know if possible dfu restore by configurator without battery and housing. for exampleif can I do restore if i have only connected motherboard by usb to another mac and also plugged on charger?.thanks i forced to be in dfu mode by changing u4770. so dont need keyboard for dfu i am...