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Old 08-30-2021, 09:14 PM   #1
ss45
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Default Nintendo switch no short charges fine battery full but no boot no sound

As the title says I have 2 switches showing the same symptom.

After quick investigation I found no short on usb c power of or video chip.

Initially the batteries was flat, after leaving it a while to charge they got full just fine. While charging the battery icon was not shown on screen. Using usb meter gave usual reading that is [email protected], [email protected] during early and middle of charging cycle respectively

To check if the battery is charged or not I teardown the unit and directly probe battery terminal which gives 4.17 volt more or less .

Pressing power button doesn't give any response, no sound or picture. Long pressing do nothing either

I am really confounded and hope gurus and masters here could point out possible fix

Thank you

Last edited by ss45; 08-30-2021 at 09:21 PM..
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Old 08-31-2021, 04:05 AM   #2
digby1951
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Default Re: Nintendo switch no short charges fine battery full but no boot no sound

https://logi.wiki/index.php?title=Ga...ClCwnHCzaCuwVU


ohms readings......may help find ur fault.....switch light and switch
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Old 09-05-2021, 08:29 AM   #3
ss45
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Default Re: Nintendo switch no short charges fine battery full but no boot no sound

Turns out the backlight has died when I shine with flashlight I can confirm lcd shows homescreen just fine. Any idea which circuit powers the backlight ?
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Old 09-16-2021, 12:18 PM   #4
digby1951
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Default Re: Nintendo switch no short charges fine battery full but no boot no sound

https://www.youtube.com/watch?v=mZl9Mnfes_k

he's not an expert but may help you
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Old 09-22-2021, 02:28 AM   #5
elecsoluces
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Default Re: Nintendo switch no short charges fine battery full but no boot no sound

Backlight is a part of the screen, did you test a known good screen?
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