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well that sucks cant find any replacements

but it was working for a bit and stats all come up in the about this mac section, WIll check current resistors when i get back tomorrow. Any other ideas?

I have taken pictures of both sides, Well after ultrasonic it now boots. It was running off of battery after cleaning, because I dont have a usb-c hub i let it charge up to 50% so it would let me install osx. Now in osx, its saying 64% "Replace Now" and wont run off of the battery at all nor...

the only corrosion on the board was a tiny bit near Q7291, will try ultrasonic and see what happens

what is resistance to gnd on PP3V3_S4 Check u8000 r8000

My bad, was measuring while battery was still connected resistance now 20k+ Traced back and u7650 is not getting EN (PM_SLP_S5_L) now a bit confused as it seems this comes from the cpu but it needs s0 rails to power up? PPBUS_G3H 8.67v PPBUS_S5_HS_COMPUTING_ISNS 8.68v PPVBUS_LIO...

It's not detecting a load, try a known good screen or check lvds cable/connector

what voltage do you get on pin1 of j8300

work your way through the power rails see which one is missing

tried a known good dcin board?

Liquid damaged usb-c and audio boards/cable. Usb-C board doesnt look bad afaik its just corrosion on the contacts which i have cleared up. Measured rails and PP5V_S4 is missing with a 19ohm short? to gnd Also how does the disconnect battery button work? Usb-c board on the way, cant find...

after modifying the efi did you do a pram reset on the first boot?

smc getting warm :( is there anywhere that sells smcs? or just have to order the donor boards?

You need to vary the distance to fill the circle with the image

Board looks like it's never seen a dop of water in its life. no greenlight pp3v42 measures 2.1v and measures 11ohms to gnd on the system side, are there any known failure points on this board or is it a case of inject 3v and see what gets warm

You can just hold a camera up the one of the eyepieces

Double check the orientation of the chip I use a TL866, just looked up that chip and it is in the list of supported ic's

I use these https://www.aliexpress.com/item/Free-shipping-QFN8-to-DIP8-Programmer-Adapter-WSON8-DFN8-MLF8-to-DIP8-socket-for-25xxx-8x6mm/32802865327.html?spm=2114.40010308.4.23.CgKLgf

there's an issue with using adaptors on the newer boards it bricks them, much safer to just desolder the chip

the one i saw was all the models and spec variants and their respective board numbers