HP TouchSmart 610-1000z TouchSmart 610-1032f TouchSmart 610-1100z CTO TouchSmart 610-1147c TouchSmart 610-1150f TouchSmart 610-1150y TouchSmart 610-1151f The ZN8 (Arnica) motherboard BIOS ARN609.ROM Motherboard Manufacturer: Quanta Manufacturer's motherboard name: ZN8 HP/Compaq name: Arnica To erase the BIOS password follow these steps: Turn OFF the computer and unplug the power cord. Locate the CMOS & Password Reset jumper. Move the jumper to pins 3-4. Wait approximately 10 seconds and then return the jumper to pins 1-2. Plug in the power cord and turn ON the computer.