I have a 1.5 years old HP Envy notebook. I am facing the issue with battery power. The battery is getting charged with power adapter [showing orange LED while charging] and after 100% charging, it turns to white. However, the notebook is not running on battery power. As soon as I am unplugging the power adapter, it is shutting down. It is switching on only with the power adapter. System diagnostic is showing the battery is okay. All this started once the motherboard was replaced 15 days back. It is kind of random. 2 days it will work fine and 3-4 days it will not. Kindly guide me to resolve the issue.