I can not turn on wireless to my hp pavilion
You have a number of options:
1. Make sure the wireless switch is in the "on" position. This means that the switch is slid to the right. If it is, and the light is blue, then the wireless is working just fine, you just need to connect to a wireless router. However, if the light remains orange...
2. If you have Vista, go into the start menu and right click on "Computer" (XP, right click on "My Computer" on the desktop or where ever you stashed it) and click on "Manage" in the drop down menu. After you do this, you will see a menu on the left, double click on Device Manager (6th item down). This will open another list of items. You need to go to "Network Adapters". This drop list will tell you whether or not the wireless card is being detected. Should say something like "Broadcam 802.11 b/g WLAN". If you see that, the computer is detecting the wireless card and your wireless should be working (however, if it is detecting it and the wireless light is still orange, check the switch again, if it is switched on, then you are about to have a motherboard problem). If the wireless card is not being detected...
3. You either have a HDD, wireless card, or motherboard problem (more often than not it is the motherboard, and you would be hard pressed to find one cheap). If you want to simply try to replace the cheaper parts first and hope that works, start with the wireless card, then go into the HDD, after that, obviously, the motherboard. But I will tell you from experience, that it is more often than not, a defective motherboard.