The PA3489U-1MPC is not a full laptop model but rather the part number for a Toshiba Internal Wireless LAN Card. It is based on the Intel PRO/Wireless 3945ABG (WM3945ABG) chipset. Driver Details
A yellow exclamation mark next to "Network Controller" in the Windows Device Manager. Toshiba Satellite Pa3489u-1mpc Driver
In the fluorescent-lit haze of a 2007 electronics repair shop, a machine sat like an abandoned monument: the Toshiba Satellite A105, its silver lid scarred by coffee rings and the passage of time. Inside its battered chassis, hidden beneath a panel of four stubborn screws, lived the Pa3489u-1mpc — a Broadcom BCM4318 wireless adapter, barely bigger than a postage stamp. The PA3489U-1MPC is not a full laptop model
The Toshiba PA3489U-1MPC is actually an Intel PRO/Wireless 3945ABG Mini-PCI Express card Go to product viewer dialog for this item. Device Manager → System Devices → Find "Toshiba
Manual Identification: If the official site is difficult to navigate, third-party repositories like DriverScape host archives for older Satellite models, categorized by operating system. Common Driver Requirements
Because this hardware uses an Intel chipset, you can use Intel's generic drivers.