kjchatman
Badcaps Veteran
Last Activity: 09-05-2025, 02:51 PM
Joined: 12-28-2012
Location: spring lake/ north carolina
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apple configurator restore did the trick -
820-01700 motherboard charges but does nothing else
2019 16" macbook pro that came to me for a diagnostic. it charged the battery up without a problem but doesn't power up. and with the battery detached it will show 20v and 0 amps on a usb-c amp meter. i went around the board looking for a short but found nothing obvious -
i'm sure the cpu is the problem because the capacitors on the cpu for that power rail are shorted....Leave a comment:
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do you think i can swap that ryzen 7 5800h with a 5800u. That's the only spare cpu i've gotLeave a comment:
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i ended up removing the cpu after removing PQA1 AND PUZ1. and that seemed to be the issue with that power rail but APU_CORE is still 4.8 ohms even with the cpu removedLeave a comment:
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+APU_CORE_SOC has 0 ohms resistance to ground. Does anyone know the resistance on a working board?Leave a comment:
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la-l031p acer has 0v on +APU_CORE_SOC
i received this laptop as a backlight issue but i noticed that it wasn't posting. It turns out that the cpu power rails are not working and +APU_CORE_SOC has no resistance to ground. Can someone tell me the resistance to ground for this power rail? -
it boots...Leave a comment:
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was a bad capLeave a comment:
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12.38v is stable on #1. direct short to ground on #2. 0.3 ohmsLeave a comment:
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820-02020 a2338 motherboard has a ppbus short to ground
this machine came to me as DOA and immediately found the issue as a 12v short to ground. Is it okay to inject voltage into that rail or does it have a potential path to the cpu or something?
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