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how do i start in smc bypass?, perhaps is some sensor...

still does the same thing. heck, now its worse, when i short pin 5 of the keyboard to ground, i notice is turned on because i have click on the trackpad but then shuts down, whitout even givin me a image. basically no change

well here we have one with a weird ass issue. after a few seconds of powering on, it shuts down. whenever its in boot selection menu, recovery, diagnostics, or booting to mac os. if i remove trackpad flex, then it works just fine, but obviously no trackpad or keyboard. i tried another know good...

well problem solved. SMC replaced again did the trick. and fucking bill connector damaged too. i have a questrion though, why did the first replacement do nothing?. i took it from a board that had a broken processor, but that i knew it was good, because it worked before thery let it fall!

All testing done with disconnected bill connector. i removed d6950 no change, 12.3v on ppbus whitout battery, solid green light with battery. board now turns on, oddly enough my charger was just disconnected haha. i get 0.9 at l7750. R7000 ok, i measure continuity on it to u700 pin 12, like...

the initial issue was not turning on. after that i replaced u7000 for a good know one and it worked. i reassembled and then i notice that it doesnt detect the battery. checked daata lines, okay, repalced u700 again for a good know one. after that i checked ppbus, and i got 12.30v. i thought SMC...

Well, ive ordered one from ebay. ill updated the post once i get it!

This was very useful for me, just now i had this same issue, some dumbass ripped of the camera connector and the computer was slow. Thanks JohnB8812 and 2informaticos!.

2informaticos SYS_DET_3_4 is properly grounded when i put the screw. i made sure of this by testing two times. or do you mean something else?

JohnB8812 any idea where i can get a decent one?; else this customer will have to do with shit from ebay regrettably :(

well i guess im missing something, if i use red probe on ground and take the measurements with the black one i get .510 on both lines...

2informaticos SCL is open to ground....and SDA is 1080 in diode mode. as for what JohnB8812 asked, PPBUS_G3H is 12.56v!

so i got this machine, and it wasnt turning on. customer tried to dissasembly it, broke trackpad flex and fan. ive ordered those two, as a result the machine is slow for now, it has sensors issues. I replaced the U7000, the typical ISL in these. turned on. alright i reassemble but now the...

Does anybody knows if the 13'' will work on a 15'' of the same year?, i wanna know to see if i can teset the display...

Mouse blinks once and stay off...no history, board looks spotless no water damage of anything. do you have a good know BIOS for me to try?

i have this macbook air, that turns on but wont give a image; the fan spin, turn off, and star spinning like its supposed to, but after that it just keeps spinning, and the cpu heating up, no image, chime or whatever...where do i start with this?

Well, it seems its dead then, i dont have the will or the equipment to replace the CPU. the short its in CPUside. anyway, just wondering but can I test the display in a 15 inch machine?. since its dead, i was wondering how to test it...i have one macbook pro 2015 15 inch and i was wondering if...

Since i have no PPVCC_SO_CPU, i inspected U7310 and U7320. and well it seems the rail of CPUVR_PHASE1 and CPUVR_PHASE2 are shorted to ground...i measure there 0 in diode mode. i have another board here and i measure 50 there!. should i replace U7310 and U7320 only, or should i replace the four...

I?ve tried two other bios already and nothing. i dont get anything at PPVCC_S0_CPU. Do i reball SMC now or where else do i check?

All S3/S0 rails pulse when i trigger SMC_ONOFF_L. there is a pulse in pin 7 and 3 of U1950.