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Old 07-02-2022, 01:18 PM   #21
todenkopf
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Angry Re: [HELP] Lenovo V15-IIL "partial dead"

Quote:
Originally Posted by phantomEVO View Post
so game over?
If you decide to remove any pwm ic, you should also remove mosfets that are controlled by that ic prior to applying power. Unconnected gates of that mosfets will sporadically open, and let input voltage run into output line.

However, your IC has only integrated mosfets, which was removed along with IC as well. So seems its not that case i've mentioned above. Try to replace PU9700.

Last edited by todenkopf; 07-02-2022 at 01:28 PM..
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Old 07-03-2022, 10:50 PM   #22
mcplslg123
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Default Re: [HELP] Lenovo V15-IIL "partial dead"

Quote:
Originally Posted by phantomEVO View Post
so game over?
Not over. Though i mentioned it in post#3 that PU9700 is a multi regulator with builtin mosfet+dc -dc circuit but in a hurry overlooked it. Since removing PU9700 means removing all the connected fets also, chances of damage is very unlikely. So you can proceed with further diagnosis.
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Old 07-04-2022, 03:55 PM   #23
Sephir0th
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Default Re: [HELP] Lenovo V15-IIL "partial dead"

Low Ohms readings on 3.3V ALW load side is almost always a dead PCH though.
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Old 07-05-2022, 01:29 AM   #24
phantomEVO
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Default Re: [HELP] Lenovo V15-IIL "partial dead"

i don't know how to go ahead. now 3,3valw is totaly shorted....but nothing getting hot...
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Old 07-05-2022, 08:06 AM   #25
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Default Re: [HELP] Lenovo V15-IIL "partial dead"

Exact resistance on 3VALW rail?? Is the measurement without the ic soldered??
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