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is ug400 position paired or can i take any sn25a12 from a donor board?

I get 20v .30amp and charger. has max fan spin as soon as i plug in charger. its not chiming and will not go into dfu

have a board with bad nands due to a bad u9500. 1v8 line is shorted and nands are getting warm. i already ordered customer new board, but was curious to fix this to sell. i know if i swap nands from another board i need to put in exact order, but my question is there a rom i need to transfer...

boots with circle with ! came in from apple store as they could not put it in dfu mode. tried myself and would not go either. ive tried the process from https://logi.wiki/index.php/DFU_Mode_Restore_(Macs)#DFU_Mode_using_Jumper_method but im not sure if im doing it correctly. i soldered a wire...

water damage around camera lvds and wifi. getting only 5v and .04/5 amps on usb c PP3V3_UPC1_LDO - 3.23 PP3V3_S2_LDO - 0 PP1V5_UPC1_LDO_CORE - 1.583v PPBUS_AON - 12.29v 3V8_AON - 3.805v

Device came in clean with no liquid damaged. noticed L8430 was burned to a crisp. No shorts on either side so i replaced it and it got burned again. i honestly don't know where to go from here as neither side has a short.

board is pretty clean no liquid damage or corrosion. the keyboard and touchbar both do not work. i have tried with 2 known good topcases still no keyboard. i have 1.8v power on keyboard while on. diode values on keyboard pins match obdata values on flexboard view. could use a little help on...

Board was liquid damaged. turns on with charged battery. usb c connector was burned so i soldered on a new one. it will now get 20v but will not draw any amps with or without charger. kinda don't know where to start with this one.

board turns on for half second, either see battery logo or apple logo, then disappears with only backlight. i've tried putting in dfu many times but was unsuccessful. is drawing 20v with .22 amps constant.

board is booting up but has no backlight. tried with another screen (although i'm not sure if that was a known good) and still has no backlight. PPvout_s0_lcdbklt isn't short. would appreciate some help on this one.

Got a board that had liquid damage. i replaced q7680 because it was really corroded. laptop turns on but have no trakpad or keyboard. have repalced both with known good topcase.

Can someone please post a working u2890 rom. I don't have a donor to swap, so i just want to reprogram the rom and see if it fixes my issue. on usb charges and upvolts to 20v other stays at 5v.

Couple of corded capacitors right next to u9850. I want to replace u9850 as well to be on the safe side but when i go to digikey there are two different TPS62180. can someone help me choose the correct one? thanks!

History: laptop came in heavily water damaged. ssd got shorted out so i replaced the board about 6 months ago. this replacement board lasted 6 months and came back no power. 820-01700 i get 20v and drawing .45-.117amps then resets. i checked ppbus - 12.6v

so this laptop has sound issues. i don't know how to proceed with this so would appreciate some insight. the laptop always chimes, always get sound on headphones and mic is always working. i get sound for around 15seconds to 2 min of sound on speakers on a fresh startup. after that no...

I have a short on ppbus. if i remove r5400 would it be safe to inject voltage since i removed ppbus_g3h_cpu from the equation?

came in fresh, no liquid damage very clean. no fan spin ppbus - 8.6v pp5v0_s5 - 5v pp3v3_s5 - 5v pp3v3_sus - 3.3v pp5v_s4rs3 - missing pm_slp_s4_l - missing pm_batlow_l -3.3v PCH_DSWVRMEN - 3.23v PM_DSW_PWRGD - 1.036v <--- is this the problem line? SMC_ADAPTER_EN - 3.4v PPVRTC_G3H - 3.3v...

Board came in for no power. drawing only 5v 0 amps. i checked all the coils and large caps and found a short on ppbus_g3h. I took off f7000 and injected voltage but nothing is getting hot. (checked with flir). any suggestions on how to find the short?

got a macbook that customer does not remember the 6 digit iclould lock code he put on his laptop. data is very important at this point. i can hit "remove from account" which will turn find my mac off to do a reset but as i said data is super important. what are my options here if any?

board was liquid damged around smc area. i have reballed smc and now have orange/green light i have 3v42 and ppubs. i am assuming that this is not turning on because all of my 3v3 lines are pulsing. could you help me figure out why 3v3 is pulsing. could this be because the smc is bad...