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Model numbers JSN-L21 and JSN-L42.

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Phone not responding, no charge indicator light.

My smartphone stopped working after i had charged it to 100% capacity overnight. The next morning i was still able to use the phone, but i noticed it stopped working after class. The battery is still fine (i checked it with a multimeter). Maybe a broken powerswich? There is no red indicator light or a charging iconon the screen (Was just replaced) while trying to charge the smartphone. Maybe a bad charging circuit?

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Paul Streck  sure could be a failed charging circuit. The very first thing that you do want to rule out is the battery. You cannot check a battery with a multimeter since it may show proper voltage but can fail under load. Replace the battery and re-evaluate.

Of course, you also want to make sure that your charger works properly as well as your charging cable.

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I am 90% shure that the battery is not the problem, because the red charging indicator light is not lighting up. The light shouldn't be that much of a load to cause battery voltage sag. My charger and cable are working properly. I personaly think that there is a problem with the mainboard power delivery since basic things like the charging indicator are not lighting up.

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If you know how to open the phone, try unplugging the battery and pressing the power button for 1 minute to drain any excess power in the device that may be causing this.

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Tried, but didn't fix it :(

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I have slept at night by keeping phone beside me and when I saw morning it didn't work from last 1 month

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Paul Streck will be eternally grateful.
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