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Ask NM-A805 NO POWER NO CHARGING INDICATOR

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techpartners

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Hi Tech Team

Asking your help with regards to NO LED/NO POWER indication in NM-A805 laptop motherboard there is no short circuit since I could see voltages like 20/5/3V however i could not see any LED lit once i connected the charger.

Also I would like to ask what IC controls the litting of LED in power adaptor?

Action Taken:

1. 20V rails is present
2. 3/5VALW are present
3. ON/OFF Button from 3V to 0 if pressed

Issue: No LED/No Power Indicator

Thank You in advance.
 
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