Suggest you check first for damage to the Display Cable, before going further.
This is HP Support, the support page for the HP Pavilion dv2000 series laptops, and the Manuals download page,http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&lang=en&product=1817074&
Left-click on the first file name -
HP Pavilion dv2000 Notebook PC Maintenance and Service Guide.
After you click on the above PDF file name, you may not see anything happening for up to 30 seconds. The file is downloading in the background.
(For a test I downloaded it just now. Took almost 40 seconds with a medium speed DSL connection)
Don't know if you are familiar with PDF files. If so disregard the following.
Suggest you view the file at the 100% view. You can enlarge the view later anytime you wish.
At the top header is a Zoom In icon, and a Zoom Out icon.
Zoom In +
Zoom Out -
To the left is the Bookmarks menu.
By default it opens to the main heading - Maintenance and Service Guide.
Left-click on the + sign to the left of Maintenance and Service Guide.
Scroll down the sub-headings, and left-click on the + sign to the left of -
Removal and Replacement Procedures.
Now scroll down, and left-click on -
5.12 Display Assembly
You're on Page 145.
Use the blue Down Arrow in the top heading, and scroll down to Page 146.
I want you to view the Display Cable, item number 1.
Enlarge the illustration.
Scroll the page up a little for better clarity of the Display Cable.
The number 1 is pointing to the male connector on the end of the Display Cable, that plugs into the motherboard.
It is shown unplugged from the female (White) connector on the motherboard.
The Display Cable connects to the motherboard, and then routes to the LCD Display screen via right by one of the hinges. (Left Hinge)
Opening, and closing the laptop can cause the Display Cable to become partially disconnected from the motherboard.
The area the cable routes through, may cause damage to the cable over time. Generally the damage is visual enough to see.
Sometimes the cable is stretched, and the damage is not readily apparent.
The tiny wires inside that cable's sheath can be stretched far enough to break, and the outside sheath will show no apparent damage.
Fun stuff, huh?
Most of the time however, the male connection on the motherboard, has become partially disconnected.
To access the Display Cable:
1) Remove all power to the laptop.
Remove the AC adapter (Charger), and the Battery.
2) Lay the laptop on a table, push the LCD display assembly until it is laying flat on the table.
3) Remove the Keyboard.
4) Remove the Switch Cover.
I await your reply (Via a Comment) after you have opened the laptop, and diagnosed whether you have a Display Cable partially disconnected, or damaged, or no apparent damage is visible.
[ You may have to remove the Display Bezel from the Display Assembly, and look at the connection of the Display Cable going to the Inverter.
Pages 148-149, and 152 ]