Working on a 820-3115 board under microscope camera (NO AUDIO, nothing to see) Part 2
Автор: piernov
Загружено: 2020-11-15
Просмотров: 179
Continuation of previous useless video.
Still the nightmare-ish 820-3115 board.
Reballing another PCH at the beginning, soldering process is not captured on video but now it's soldered on properly. After that, board was beeping once due to the SDA line of the SMBUS for RAM being pulled low by CHS chip, which in fact was caused by a missing inductor for its supply. Putting it back solved that, got image but still no backlight. Jumper wire for burnt backlight via has also been run off camera, backlight was back but still a good amount of work to do, like replacing heavily corroded caps, touching up some sensors, replacing missing components, etc.
At the end of this video its boots into macOS and runs Unigine Valley and Prime95 to confirm it is stable. A few functionalities are tested successfully but it looks like headphones aren't detected.
ASD EFI doesn't pass due to an issue on PPBUS_G3H voltage sensing, which is an area that was touched up, so that will have to be fixed as well.
It's quite a miracle for this board to have gotten this far, but it's still not the end.
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