Re: MBP 820-2879B Board view vs actual board
Thanks!
I'm just getting organized here with some appropriate tools for SMD work.
Once I get a couple of other (non-electronic) projects out of the way, I'll be back.
:-)
Mackayak
New Member
Last Activity: 03-01-2019, 11:08 AM
Joined: 09-07-2018
Location: Victoria
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Re: MBP 820-2879B Board view vs actual board
Thanks for that explanation about the boardview - I'll stop worrying about that.
I'll report back once I have some more ideas about the power rails. Basically most of the points on the board where I look for S5 or G3H power rails (like PP3V42_G3H), I get <1 volt. So I've started working my way 'in' to the board from the adapter in following the 16 volts (approx) - perhaps not the right strategy?...Leave a comment:
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Re: MBP 820-2879B Board view vs actual board
Piernov-
Thank you for your comments and suggestions- I really appreciate all the help I can get!
:-)
I don't what is customary here; I was thinking it would be better to start a new thread (discussion) about the actual problem and troubleshooting and diagnosis?
Before I do that - a question about power for troubleshooting. Most of the videos (Louis Rossman, Powerbook medic) seem to focus on the charger (getting PP3V42 and the one-wire circuit working to turn on the charger supply). Isn't it simpler to use...Leave a comment:
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Re: MBP 820-2879B Board view vs actual board
A bit cleaner now....
[ATTACH]182456[/ATTACH]...Leave a comment:
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Re: MBP 820-2879B Board view vs actual board
Cleaned the board well with distilled water and then 99% isopropyl alcohol and dried it.
It looks a lot better but still doesn't work, so I'm continuing with the troubleshooting.
I'll grab a pic of the clean board later today and post it here, just to show some improvement in 'looks'. It's also a lot easier to measure voltages and resistances when the components are clean, so I should have cleaned it as a first step.
The troubleshooting would be easier with an accurate .brd file, though, so if anybody has...Leave a comment:
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Re: MBP 820-2879B Board view vs actual board
Yes, it does look bad when magnified.
I have seen 'bad looking' electronic boards working, and 'good looking' boards that don't work!
What's the best way to clean a board like this?
I don't have an ultrasonic machine....Leave a comment:
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Re: MBP 820-2879B Board view vs actual board
I know there's a lot of dirt - probably from a liquid spill- but I'm trying to figure out the exact cause of the failure.
I doubt that just cleaning the board will solve the problem, but it's on my list of things to do. I need to remove the speaker and heatsink first.
Perhaps these pics will help show some differences:
[ATTACH]182390[/ATTACH]
[ATTACH]182391[/ATTACH]Re: MBP 820-2879B Board view vs actual board
I know there's a lot of dirt - probably...Leave a comment:
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MBP 820-2879B Board view vs actual board
I'm trying to troubleshoot a 'dead' Macbook Pro 2010.
The logic board is 820-2879[B]B[/B]
Thanks to everybody who have uploaded schematics and .brd files here - it's a fantastic resource and a great help to me.
However, the .brd file that I've found here seems to be for a different version of the 820-2879 board as the component layout is different in a few areas.
Does anybody have a .brd file for the 820-2879B logic board?
It would be a big help.
Thanks
[ATTACH]182379[/ATTACH]
[ATTACH]182380[/ATTACH]I'm trying to troubleshoot... -
Re: New Members - please post your introductions here
Hi-
I just found this forum as I am trying to do a repair on a 'parts' MacBook laptop.
I've done a fair bit of electronics building, but nearly all of it has been 'big' stuff - tube audio amps and the like.
So looking at boards through 10X is a whole new world for me!Leave a comment:
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