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replaced SMC and still have the same problem. then replaced U5400, U5410 and UD240. made no difference. i have no idea ;( however, Windows 10 is fast even with boot camp drivers. any way to see which kext driver in OSX causing it?

SMC likely to be dead. what voltage on PPBUS?

fixed. 1 of the WS pin on J5713 had no resistance to anywhere at all, so I touched up all the pins on J5713 and U5701 with fresh solder.

I'll do the continuity test from J5713 to U5701 in first thing tomorrow.

you are right, i thought Q and Z was working. now i tested 1, A, Q , Z, f11, f12 doesn't work.

let me run some test, get back to you. no, I haven't try PRAM.

I've tried over 5 keyboards, new, old and it is always 1 and A key isn't working. J5713 connector looks very clean. can't see any corrosion inside the connector nor on the pins. U5701 looks good as well. all other keys are working. i can't see any corrosion on the logic board. any idea? bad...

I've bought an eBay board, fixed with the u8900 reflow. when i edit the eBay board's serial number to match the serial number to the one on the bottom cover. The system serial number in ASD has become "not available". however, OSX can see it fine. any idea why is not working in ASD but works...

ASD EFI 100% passed. Everything is connected. Charging and running the battery is fine. I will try ASD OSX... ***edit*** in ASD OSX show two failed Thermal Interface. ​

drop damage? could be a cracked solder ball under the RAM chip. I would try reflow these RAM. Nudged each chip a little to verify it actually reflowed.

the board was liquid damaged, corrosion on the SMC area, thunderbolt area and i/o board flex cable. reflowed SMC and replaced any corroded ic. i/o board flex cable has been replaced. after that board can turn on. passed ASD 100% no sensor error. but activity showing 300-600% CPU usage on...

however, I always change that cap whenever I get my hand on that board. check voltage on C9560, the voltage should be between 1.35v-1.5v

doesnt look like it. usually wouldn't power on or you get black screen. my bet is on VRAM and GPU.

excellent, just like my board :)

https://www.ebay.com/itm/192019183000 I've bought from this seller many times.

can i use 2015 battery? 2015 = 7.55 V, 39.71wh 2016 = 7.56 V, 41.41wh edit.# yes 2015 battery works fine in 2016 MBr.

I need help editing the serial number of this eBay board to match the serial number to the one on the bottom cover. The system serial number has become "not available" after editing the SPI ROM. the board can read original serial number but not mine one. this usually works for me but not this...

worked!. thank you 2informaticos and Louis ;)

they all looks good and all within spec. i even replaced U5410 and c5413. i will try r002 for r5410

i would try another u8900 chip if you haven't yet. they can go bad.