BIOS ERROR MESSAGES

• BIOS ROM checksum error—system halted The checksum of the BIOS code in the BIOS chip is incorrect—this is a fatal problem, indicating the BIOS code might have become corrupt. They will need to replace the motherboard BIOS before the system will initialize.

• CMOS battery failed The CMOS battery is no longer functional. Need to replace the CMOS battery.

• DMA bus time-out A device has driven the bus signal for more than 7.8 microseconds. This might be a random fault, but chances are that a device in the PC has failed. Try removing expansion devices first. Otherwise, replace the motherboard.

• Cache memory bad, do not enable cache POST has determined that your cache memory is defective. Do not attempt to enable the cache in your system.

• DMA  error A serious fault has occurred in the DMA-controller system of your motherboard. In virtually all cases, the motherboard will have to be replaced.

• INTR #1 (or INTR #2) error A serious fault has occurred with your interrupt controller on the motherboard. In virtually all cases, the motherboard will have to be replaced entirely.

• Primary input device not found: The primary input device, such as the keyboard or mouse or other device if input is redirected, could not be found. Check the installation and configuration of all your input devices. Be sure that the input devices are also enabled in CMOS setup.

• PCI IRQ conflict: Two devices requested the same IRQ, resulting in a conflict. Try freeing the IRQs needed to allow both devices to be configured properly.