Screen will not stay upright, can it be fixed?

The problem may be due the graphics card or data cable or backlighting.

The data cable can be severed over time though opening and closing the display. This can be replaced.
The backlighting/inverter dies, some-times the windows desktop screen can be seen if one looks carefully. This can also be replaced.

Try connect your notebook to another computer's monitor via VGA or HDMI out.

If this works then the problem lies with your LCD screen.

Take care!
damnor01

visit a shop to get it fixed

In this regard there is something happen on the video card cable underneath on the hinge of the laptop. I have also Presario laptop that has same issue that you encountered.If you can able to open the laptop's hinge to check the video cable connection then you can check on it by resetting the connnection though. If your not able to do so either to go in the computer shop or have to call HP/Compaq for assistance. Thank you.

Is your computer setup to go to sleep when you close the lid?

Click on start -->control panel-->power options and then check the option that says choose what closing the lid does. You have to change this setting to 'do nothing' if you want the computer to stay on when you close the lid.

It may be the cable that attaches behind the screen is loose. If you type in your model# and "lcd replacement" in Google you will often find a tutorial on how to take it apart. Patience though our you will break something!

sounds like the inverter has gone, the only way to test this is to remove the laptop lid, remove the bezel (front plastic cover) please take care not to crack or splitt the plastics, then get an electical tester and test the inverter coil to make sure a current runs through it, if it doesn't its the coil, if it does you need a new inverter, the coil is located under the plastic sheath

good luck

you have changed the settings
do you see screen of bios?
if yes then u will have to run the machine in safe mode and change the resolution

Go on ebay and buy a pair of hinges.

I had the same problem, they are very easy to fix, I did a search earliar and found some on the link below.

http://www.pchub.com/uph/laptop/291-29919-6327/Compaq-Presario-V4000-Series-Hinge.html

You do not need to dismantle to base, you have some star screws under the battary and one either side that loosens the small panel near the screen (where the power button is). The screen cover has screws under the plastic covers then just unclips, be gentle. after that it is self evident

First, are you sure it's the backlight and not the "inverter" or the motherboard not turning on the "brite" signal ?
Any way, to fix the backlight, you have to remove the screen from the laptop (in most cases) and then open the screens plastic case. Then, there should be a little circuit board at the bottom of the screen;that's the inverter.Disconnect both wires from it (there should be wires on each side of it).Now remove the screws holding the screen in the plastic case and lift out the screen.At the bottom edge of the screen,you'll find a piece of silver / metallic tape. remove this tape CAREFULLY . Also on the bottom edge there are tiny ( I MEAN TINY) screws at each end of the screen.Remove these carefully lift the metal cover along the bottom of the screen and the backlight is underneath this cover.