A wireless router takes an existing Internet connection and broadcasts it over the air. Your computer picks up on this signal, and the router sends network traffic to your computer wirelessly. When any computer, like an HP laptop, cannot go online wirelessly, the causes can be many, but with some know-how and basic troubleshooting you can be up and browsing on your wireless network in no time.
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Check wireless components. HP and all other brands of laptops have a radio button, usually located near the top of the keyboard, that allows you to turn the wireless card on and off with the touch of a button. You will not be able to see any wireless networks until the wireless card is enabled, so if the card is disabled, enable it by pressing the radio button.
Reset your home network. A great many Internet connectivity issues can be resolved by a simple reset or powercycle of all the devices that make up your home network. Unplug the power cords of both your Internet modem and wireless router and leave them unplugged for a full 30 seconds. Restart the computer after plugging them back in and see if your computer will connect to the wireless network. If not, some further troubleshooting is required.
Bypass the wireless router. The final troubleshooting step involves bypassing the wireless router and connecting the modem to the computer as a way of testing if the router is causing the issue. Take the Ethernet cable that connects the modem to the router and unplug it from the router. Plug the Ethernet cable into the computer and reset the modem as described in Step 1. If this restores your connectivity, it is necessary to contact the manufacturer of the router to figure out why there is no connection when running through the router, or contact HP for a possible issue with your wireless card. If there is still no connectivity at this point, contact the technical support department of your Internet service provider (ISP) and have them troubleshoot a possible issue with the modem.