Re: A n00b needs your help - Macbook pro 17" mid2010 820-2849-A
Hmm okay.
Heatgunned the GPU - no difference.
Heatgunned the VRAM chips - no difference. Still tiny amounts of artifacting.
jultsu
New Member
Last Activity: 12-07-2019, 01:00 PM
Joined: 12-04-2019
Location: Tarnów
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Re: A n00b needs your help - Macbook pro 17" mid2010 820-2849-A
Thanks, will try that later. There is some browning around the VRAM chips' glue, this board has probably been heatgunned around that area earlier
[url=https://aijaa.com/X8Nhp7][/url]...Leave a comment:
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Re: A n00b needs your help - Macbook pro 17" mid2010 820-2849-A
Well, now that applied some alcohol (fairly liberally) to the board around U5340, I started getting some distortion in the picture. This hasn't happened before.
[url=https://aijaa.com/XlQd5Q][/url]
U5340 because I tried hunting for GFXIMVP_ISNS_IOUT voltage (found something in Rossmangroup's website: [url]https://boards.rossmanngroup.com/forum/board-repair-troubleshooting/33595-macbook-820-2849-a-problem-no-video-black-screen-no-backlight[/url]) and I also get about 0.02v on R5379, would...Leave a comment:
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Re: A n00b needs your help - Macbook pro 17" mid2010 820-2849-A
Well, replaced the c9560 with a 6.3v 220uF "C" sized poly cap, no help. Still boots mostly with the broken graphics, sometimes the picture is ok again. Heatgunning the c9560 area doesn't seem to help anymore as well. Would this mean that the GPU has had it?Leave a comment:
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Re: A n00b needs your help - Macbook pro 17" mid2010 820-2849-A
The split screen issue returned with a hard freeze after one hour of Youtube playback / 3d benchmarking with the Nvidia chip enabled.
I might try to concentrate the heat output purely just to the single cap somehow to try and isolate the issue even further.
Is there any other poly cap that i should be looking at, since the issue most likely isn't with the GPU or the VRAM chips?Leave a comment:
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Re: A n00b needs your help - Macbook pro 17" mid2010 820-2849-A
So... after heatgunning very gently the general area of the C9560 the screen output did return back to normal. So I'm guessing its still the poly cap which is causing these issues?Leave a comment:
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A n00b needs your help - Macbook pro 17" mid2010 820-2849-A
I have a 820-2849-A which has the following symptoms:
Screen output is cut in half, the left side being on the right and the right side on the left, with a black void in the middle. Pictured is the Apple Hardware test running from a USB stick:
[url=https://aijaa.com/QleQi5][/url]
Problem is not with C9560, it is holding a nice 1.845v against the ground from the moment the board powers on.
Trying to boot to macOS hard crashes and computer restarts.
I used to be able to disable the Nvidia GPU by EFI shell commands, which would restore...Last edited by jultsu; 12-04-2019, 12:37 PM. -
Re: macbook pro 2010 mid 17 inch boardview file 820-2849
Thanks from here as well
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Re: New Members - please post your introductions here
Good evening.
Registered to download 820-2849 schematics.
May stick around for even longer?Leave a comment:
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