The laptop is not charging though the power is available. Battery sign keeps on blinking in random intervals. It will charge for 30 seconds then will not charge for 10 seconds. Also, this behavior is worse when the charged percentage is below 80%. As a result though it is plugged on, the battery will decrease and ultimate battery will come to zero. I have done a oft reset, a hard reset and even installed new copy of windows. when installing windows or when viewing bios settings, the battery bulb is not blinking. But when I come to the welcome screen and then log in issue comes.