Search results

I've got this 820-00165. It powers on and runs great but the fan is running at full speed. i ran the onboard hardware test and id came back with some bull shit about there may be an issue with your s.m.c. check the pic. I did look around for liquid damage and didn't see anything of concern just...

well i guess i better stop doing it. I've done it successfully a few times already.

The only issue with doing these updates is that they want you to run them from OS X 10.7 Lion for one of them and OS X 10.9 mavericks for the other. just recently had 2 machines do this on me after board repare. so maybe its a too much heat issue?

i put the 2012 13" retina display on the late 2013 and no video no backlight, but when i put it back on the 2012 i get video and back light. (was gonna remove the panel and put it in the 2013 lid so i have the correct isight cable)

When i see high cpu usage like that and it passes both ASD EFI and ASD OS, i've found that there is an issues with the boot rom firmware/ smc firmware. Normally after downloading these from Apples website and running them problem goes away.

Have you tried running ASD os and ASD efi? note: this model is well know for bad video card. if you try to boot to ASD o.s. and get only white screen you're screwed and its the video card.

thanks. i was thinking the same thing.

Usually when i see high kernel usage i have to run the update for the boot rom and smc from apples firmware website. note: usually it has to be done from os x 10.7.

was wondering if the 2012 13" retina screen is compatible with the late 2013 13" ?

it is on the top of the forum page there are 3-4 post in different colors. one says something about backlight

What voltage do you have on the PP3V42 rail?

i been catching the mux failure in ASD testing.

reballing those suck. 0.2-0.25mm solder balls. thanks for the advise.

ill try the reflow. i seem to have a high failure rate with these in the 2010-2011 mbp boards, which i know is a huge problem for them. thanks for the help.

Does anyone know of a source for the mux replacement chips for the 820-2850 boards?

I got one off him a couple months ago. :)

Ok we got this one fixed. broken traces around the u5010 killed me on this one, but was a good lesson for me. thanks for all the help duke. you can mark this one as problem solved.

ahhh ha. i found an issue with a broken trace going to r5339. Will change and report back.

yes the board does turn on but fails asd efi now for.... sensor voltage (vn0c)-- axg vcore sensor is reading above the high limit. sensor value is reading at 2.55v when high limit is supposed to be no higher than 1.7v. i found the short to ground on pin 2 of r7550. so not sure how it could be...

ok. so i took a look at the area around u5010 to find that i not only had a broken trace between pin3 of q5480 and pin 1 of r5339 but that it was shorted to ground as well. removed some of the trace and ran a wire that solved one of the issuesin asd, also notice a broken trace from pin1 of u5010...