I've inherited a broken HP Pavilion tx1000. It was suffering from the classic no WIFI detected problem. Meaning, that a WLAN mini PCIe adapter is installed and it works, but the computer doesn't detect it. Additionally, when I ran the Windows 7 experience score test, the notebook computer would blue screen. There were other problems such as the mouse pointer would disappear after prolonged use and the display would get staticy after a while.
All these issues were caused by the NVidia video processor solder joint being damaged from overheating.
You can find additional information about the HP Pavilion tx1000 here.