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.
Did your laptop come with Windows 7 or was it an upgrade? Try this procedure below. I found this somewhere and it may relate to your problem, I cant remember where I found it so I cant give credit to the originator. Give it a try see what happens.
01. Turn off laptop.
02. Unplug AC power.
03. Remove battery.
04. Replace AC power.
05. Turn on laptop, allow OS to boot.
06. Once logged in to the machine, perform a normal shut down.
FIX! Power brick had a short and smelled funny... Re-soldered the power and ground wires, and everything works again.
If anyone else has this problem, try someone else's power adapter of the same brand and model. Then buy a new power block if you're not comfortable soldering power wires.
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