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Ersterhernds iMac G5 20 Inch A1076 Project

Joined
Feb 17, 2012
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2
Motherboard
Asrock
CPU
intel core i7 4790
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Nvidia geforce gtx 680
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MacBook Pro
Classic Mac
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iOS
Thx for your reply!:) The inverter is working properly as far as I can see, the lights do go on when I plug the power cord in, the brightness control pin is disconnected, that means full backlight right?
 
Joined
Nov 25, 2010
Messages
1,214
Motherboard
MSI Z77MA-G45
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i7-3770k @ 4.3 GHz
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Gigabyte R9 280X Windforce 3GB
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Android
Thx for your reply!:) The inverter is working properly as far as I can see, the lights do go on when I plug the power cord in, the brightness control pin is disconnected, that means full backlight right?
Something has run amok with your soldering likely. Heres a link to some photos of how I achieved a solid connection, using the wire leads clipped off some resistors, then sealed firmly with JB Kwik Weld which is 100% non-conductive.

I used this method on my last two A1076 builds that I completed for other family members. It was easier and much more secure (less fragile) than the first build I did. Wish I'd known sooner.

https://get.google.com/albumarchive/100949536429216905468/album/AF1QipNpZPNGQpIaE1lgNG3-Zy1GlNUzfiarreRQzj2y


Cheers
Ersterhernd
 
Joined
Nov 25, 2010
Messages
1,214
Motherboard
MSI Z77MA-G45
CPU
i7-3770k @ 4.3 GHz
Graphics
Gigabyte R9 280X Windforce 3GB
Mobile Phone
Android
Happy to report the iMac took 10.12.1 like a champ.

Everything works great.

-Ersterhernd


Update Dec 28, 2016 : 10.12.2 installed without issue.
 
Last edited:
Joined
Nov 25, 2010
Messages
1,214
Motherboard
MSI Z77MA-G45
CPU
i7-3770k @ 4.3 GHz
Graphics
Gigabyte R9 280X Windforce 3GB
Mobile Phone
Android
Back in January I purchased an absolutely pristine iMac G5 A1076 20" and a BNIB NUC D54250WYK on Craigslist, on the same day!

Spent the last couple of months working on another build. Everything works great, including stereo Apple Chime at startup. I'll add details to this post when I get time. The new system is running 10.13.4 now.

20180324_210334.jpg
20180325_163646.jpg


Cheers!
Ersterhernd
 
Last edited:
Joined
Aug 5, 2010
Messages
183
Motherboard
Toshiba Satellite C875 / Dell 13Z 5323
CPU
2.4 GHz i3 3110M - HM76 / 1.9GHz i3 - HM77
Graphics
HD4000 1600x900 / HD4000 1366x768
Mac
iMac
Spent the last couple of months working on another build. Everything works great, including stereo Apple Chime at startup. I'll add details to this post when I get time. The new system is running 10.13.3 now.
You are an inspiration to all. So neat and tidy. It looks great.. Bravo :clap:
 
Joined
Nov 25, 2010
Messages
1,214
Motherboard
MSI Z77MA-G45
CPU
i7-3770k @ 4.3 GHz
Graphics
Gigabyte R9 280X Windforce 3GB
Mobile Phone
Android
You are an inspiration to all. So neat and tidy. It looks great.. Bravo :clap:
Thx carl. This is my 4th one of these A1076 units. In my opinion, they're the primo iMac to mod. Nothing touches them.

I made one significant breakthrough in this one, in that I found a way to isolate the USB ports from each other and re-use them by soldering to the leads on the backside of the board. Saved a TON of work in re-aligning new ports to the rear I/O as I did in the previous builds of this unit. Wish I'd known sooner. I'll post how I did it in a day or two.


Cheers
Ersterhernd
 
Joined
Aug 5, 2010
Messages
183
Motherboard
Toshiba Satellite C875 / Dell 13Z 5323
CPU
2.4 GHz i3 3110M - HM76 / 1.9GHz i3 - HM77
Graphics
HD4000 1600x900 / HD4000 1366x768
Mac
iMac
I made one significant breakthrough in this one, in that I found a way to isolate the USB ports from each other and re-use them by soldering to the leads on the backside of the board. Saved a TON of work in re-aligning new ports to the rear I/O as I did in the previous builds of this unit. Wish I'd known sooner. I'll post how I did it in a day or two.
Cant wait to read it. I think you are right about the A1076. Right now trying to mod this 20" G4 and very frustrating. I cant seem to get to the finish line, always facing some obstacle. Taking way too much time. I want to get to that 24" one.
 
Joined
Sep 28, 2018
Messages
1
Something has run amok with your soldering likely. Heres a link to some photos of how I achieved a solid connection, using the wire leads clipped off some resistors, then sealed firmly with JB Kwik Weld which is 100% non-conductive.

I used this method on my last two A1076 builds that I completed for other family members. It was easier and much more secure (less fragile) than the first build I did. Wish I'd known sooner.

https://get.google.com/albumarchive/100949536429216905468/album/AF1QipNpZPNGQpIaE1lgNG3-Zy1GlNUzfiarreRQzj2y


Cheers
Ersterhernd
Hello! Do you have pinouts table to do this? I can't look all pins on photo to right connect. Thanks!
 
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