how do i turn on dv6000 light

Right click on My Computer, Properties, Hardware tab and go to Device mananger.

Most of the time you can check if you just go to My Computer and it should be below your hard-drive and DVDrom. If you see a camera icon double click on it.

Insrtuctions...........

1. Click Start, Control Panel, Performance and Maintenance, and then System icon.
2. This opens the System properties window.
3. Select Hardware tab and click Device Manager.
4. From device manager.
5. Update driver
6. Let me choose
7. Show a list to select from.
8. USB Video Device
9. Select driver, Driver is USBdevice.sys

Now, I recommend you to install the drivers from the below link:

ftp://ftp.hp.com/pub/softpaq/sp36001-36500/sp36128.exe

Installation Instructions:
1. Download the SoftPaq .EXE file to a directory on your hard drive.
2. Execute (click) the downloaded file and follow the on-screen instructions.
Hope all goes ok.