Multiple problems on my pavilion dv7 started at once:
The battery will only charge with the computer off. When it's running it says "plugged in, not charging." Replacing the battery did not help.
When I press the power button, it will sit for a few minutes, up to 20 minutes with the LED lights on, display off, fan on, and hard drive apparently doing nothing. Then after a while, with no input from me, the display will turn on, and it will start to boot and start up windows normally (Vista home premium). The same thing happens when waking from standby; it will sit for a few minutes then wake up.
Once started up, it appears to run normally except for one mystery: the caps lock and num lock LEDs flash. They are not flashing out a number sequence as suggested in one online HP resource, but instead they slowly flash on and off as long as the computer is on.
Ideas, anyone??