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As Duke says could be because of the memory Other options: 1 Check battery connectors 2 Install clean OS X 3 Reset PRAM and SMC Did you try efi ASD? What I have read now: "820-2850 also have rampant kernel panics due to issues with VRAM, pgood signals and other that is too much to mention...

I reply to myself: http://es.aliexpress.com/store/produ...storeId=917471 Also I didn't see this post: https://www.rossmanngroup.com/boards/forum/board-repair-troubleshooting/208-820-3115-b-smc-missing-pad-pin-156-and-154

Yes that is! Thank you

I remember a green conformal coating pen but I don't remember in what video Louis talks about it, can anyone put a link for buying it? Thanks

Where did you get reballed SMC?

did you try a smc reset? If nothing happens...check u7000 pins 27/28 on resistance mode and write down values 17/18 pins too, I had the same problem on the same board 2 days ago.

What I read is that the carbon filter needs another filter to avoid changing it too fast. Check this out: https://www.hakko.com/english/products/hakko_fa431.html

1 thing that I have learned is never use flux based in water I have used JBC flux and LA CO and they are piece of crap for electronics Avoid them, learn from my mistakes.

Fuck!! I didn't know it, thanks aprendiz, in few days I will get the amtech flux from Louis

Yes, that is why I bought you the amtech 559 If I leave the flux one day I can see moisture and corrosion in only a day this is what I have actually, the flux is good when you are soldering but it is a piece of crap because of this PS: I don't use the brush

HI, when Im working on a board and I use flux, I cannot leave the board with the flux because of corrosion, or use 99% IPA and leave it. What do you guys do when you are working in a board for a long period of time to avoid moisture or corrosion?

68 mv on ac in and gets hot, so u7000 is fucked!! More are coming but until then...we have to wait for it.

No, without charger why?

AC IN U7000 DIODE MODE 0,005 V Could be bad that u7000? But when I measure ppbus_g3h with no u7000 in f7040 shows 1,8V- 2V

pins 27/28: 20,2 ohms pins 17/18: 2,8 ohms

Ok thanks but if the pin 1 is OL where can I follow the white rabbit? SMC_DCIN_ISENSE??

I think those pins must be like they are now, anyway I have measured u7000 pins without the chip Values are: pin 1:OL pin2:OL pin3:OL pin4:0.563 V pin:5:OL pin6:0,663 V pin7:OL pin8:OL pin9:OL pin10:0.614 V pin11:0,613 V pin12:0,337 V pin13:0,463 V pin14:0,488 V pin15:OL pin:16:OL pin17:0,447...

It seems something related to heat, did you try changing the termal paste and cleaning the heat pipe, fans and check if they are good? I would try with that first

Do you see those lines when you just turn on the iMac or you see the apple logo?

No Title Ok, next episode on this mofo mobo, yesterday night everything was good, green light... I was going to measure all the things you told me today and...no green light...now ppbus_g3h 2V hmm, then u7000 was shorting!! I quit the U7000 check pins 27 28 and they are shorted!! (diode mode =...