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hp 840 G1 Powe led blinks white 9 times and computer doesn't see AC

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Hp 840 G1

Recently i've got problem with charging my computer. When i connect charger power LED flash white nine times and computer doesn't see that AC is connected. But sometimes - recently more less - it starts charging. Then for some time it works just fine to the moment, when i disconnect AC and work on battery.


I use Manjaro os. It;s definetly not a battery problem - cause i've got spare one and it works just the same. Moreover it's not a problem with a AC adapter - my girlfriend has the same output and it works like mine.


Please give me some insight.

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