First things first, check to make sure that your new wireless chip was correctly installed. If all pins and cables are correctly hooked up, then it may be a problem with your computer's drivers. The new wireless chip may not be able to communicate correctly with your computer due to out dated WLAN drivers. HP provides WLAN drivers on the HP 200-2d22DX support page found [http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?os=4132&lc=en&cc=us&dlc=en&sw_lang=&product=6617196#N661|here|new_window=true]. Make sure to install the correct driver for your wireless chip's manufacturer!