Rev 1.02a Manual: Acer Ipimb-ar

Some Acer cases have a chassis intrusion switch. If you remove the board and run it on a test bench, you may get a "Chassis Intruded" error message on boot. This can usually be bypassed by resetting the CMOS via the jumper (located near the battery) or by ignoring the message and pressing F1 to continue.

To enter the BIOS, power on the system and immediately press the key (typical for desktops) or Boot Menu: