I have an HP dv7-1260us, and the power adapter light is on, everything is plugged in correctly, but the charging light in the front of the laptop is flashing. It charges the battery just fine when the laptop is powered off. If I am booted up into my OS, and it's not charging, I can unplug the power source from the wall and wait a few seconds, then plug it back in. THEN it charges for a few minutes, or a few seconds then it goes back to battery power and flashes the front lightning bolt indicator.