Power LED light is turning orange and white during AC plugged-in either laptop is running or not.

[VimalGsr]

My HP laptop screen is brightening and dim after 1 minute and it is happening each time when AC plugged-in. I checked and found that battery icon is showing power mode "plugged-in" for 1 minute and then changed to "charging". It is very strange situation.

I also checked that my laptop is shutdown and AC power plugged in and power lED is showing orange for 1 minute and then turns to white color. Than again turn to orange color.

I searched in HP community section for this problem and do the following solution but did not get success.

1. I removed the battery, press the power button for 30 seconds 

2. I removed the battery driver from device manager 

Please note that earlier I have upgraded the bios from HP support assistant.

Can you tell me what is exact problem and what is exact solution for it.

[Lil_Boy_Blue]

Hi
First:- Turn off the computer, press and hold the PWR button for 4 seconds.

Then - Leave only keyboard and mouse connected, disconnect all externally connected
devices such as Docking Station, USB storage devices, displays, and printers.
Unplug the AC adapter from the computer.

Next - Press and Hold the Power button for 15 seconds to Hard Reset.
Rinse and Repeat; Re-Connect the AC adapter.

NOW begin checking/testing/proving the Hardware is fit for purpose.
Power on your PC, press ESC (repeatedly), then F2 at the prompt.
Choose System Tests (Fast Test does a 4 minute hardware check).
AND/OR
HOW DO I USE DIAGNOSTICS?

HP PC Hardware Diagnostics Windows is a Windows-based utility that allows you to run diagnostic tests to determine if the computer hardware is functioning properly. The tool runs within the Windows operating system in order to diagnose hardware failures. HP PC Hardware Diagnostics Windows comes pre-installed on new HP computers, but if not on yours, download here:-
https://www8.hp.com/us/en/campaigns/hpsupportassistant/pc-diags.html