I have a Hp 15-dy2762wm laptop Windows 10 64bit and the laptop will not start up. When the power adapter is plugged in the power jack/ battery Led is flashing white every 8 seconds. The battery will still charge, when the battery wasn't fully charged the power/ battery Led would flash alternating amber and white. I removed the battery and plugged the power adapter in the power jack power/battery Led flashes white. I disconnected the ribbon cable for the usb board that's next to the power jack because I wanted to see if I could check the power jack connector to see if I was getting power through the power jack. The ribbon cable is over the power jack connector so I had to disconnect the ribbon cable to get to the connector. I then plugged the power adapter in the jack the Led light does not flash stays solid white. When I connected the battery the light was solid amber until the battery was fully charged and the Led light then turned solid white. I did try using a different power adapter that is good and having the same results. The laptop will not start trying any of the things I tried stated above. Wondering why the Led stops flashing when the usb board ribbon cable is disconnected. Its like the laptop is dead.