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HP Probook 640 G1 not charging when plugged

HP Recommended
HP Probook 640 G1
Microsoft Windows 10 (64-bit)

My Probook 640 G1, which is using an AC adapter providing a 19.5V 4.62A current, is not charging my battery.

 

Everytime I plug in the charger, the AC Power/Battery light blinks white for a few seconds and then my laptop doesn't do anything else, incl. battery charging.

 

I tried to switching to a new adapter (money wasted smh), uninstalling/updating AC-adapter and ACPI control drivers, taking out the battery then holding power button then putting it back and plugging the charger, nothing works. Not only that, but my laptopt doesn't turn on when plugging in the AC adapter, the laptop then only keeps blinking its Power and AC Adapter LEDs blinking, white and amber accordingly.

 

What's the possible solution? It used to be like that before, but it sometimes after some gentle unplugging and replugging started charging, now it just stopped. Now that the battery level is too low to even turn on, I can't even see whether the laptop is charging properly or not. Windows haven't had any warning messages related to that nor it showed the message "Plugged in, not charging".

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