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Old 03-27-2020, 09:52 AM   #6
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Join Date: Jul 2015
City & State: Vancouver, WA
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hardcore Geek
Posts: 420
Default Re: PS4 Wi-Fi chip bad joint

The general idea would be to:

1) Identify where the electrical net would go to.
2) Identify where you can jumper something to that BGA ball.

In your case: The red box looks like it's a signal pad that is connected to the via immediately to the left. You can scrape off the green solder mask from the via and add a 'jumper' wire (really thin wire -- 32 AWG (8 mil) or smaller wire for the red box.

The purple boxes appear to be connected to GND. You may be able to scrape off the green solder mask around it and get a copper foil sheet and tack it down "outside" of the BGA region.
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I'm a hardware engineer focused on networking equipment for my day job. I void warranties and fix consumer electronics for fun.
ngth82 is offline   Reply With Quote