HP Pavilion dv7 notebook-Purchased 2009- Power light illuminates.Keyboard lights up and remains lit (steady-not flashing) fan starts up and then stops after a few seconds. No picture or light on screen-no sound or beeps. Possibly causes/solutions/test. Is the harddrive interchangeable with other laptops? or how to recover data if PC is not feasable to repair? Thanks

sure in a matching other DV7
i dont think they sell stand alone chargers for LT batteries
do to no standards use in them. vast types exist, HUGE.

why not ask HP.com
only they'd know for SURE.

remove the battery then power it on

To turn on and off keyboard lights,press Fn key + space bar once at same time.

The battery light will remain on as long as the laptop is plugged into the wall.

With an extensive use of the notebook,
some times notebook would store some static charges which
indeed will stop the notebook from powering up or charging
the battery. The procedure to remove this static charges from
the notebook is known as power drain. Performing a power
drain procedure will not effect any personal data or delete
any pictures from the hard drive on your notebook.
I recommend you use Power Drain procedure by following these
steps:

1. Disconnect the AC Adapter.
2. Remove the Battery.
3. Hold the Power button down for 30 seconds to 1 minute.
4. Reconnect the AC adapter.
5. Turn on the Notebook power.

Please check by booting the Computer to Safe Mode, if the Computer boots as expected then Update the Video Driver.

Double check to see if you've left a floppy disk, flash drive or mp3 player in any drive by accident.

use the "Fn+ X" where X stands for the function key i.e. F1, F2 like that on which the small light symbol is printed

According to HP, no it doesn't.

ok it sounds like your battery was damaged when it discharged. try removing the battery and plug in to wall socket. boot computer ,.. if it boots up completely then you will need to replace your battery