World Magazine 2024

Operating System Not Found If you have arrived here through a search engine, and there’s no menu to the left click here! Missing Operating System or Operating System Not Found ..on boot device or boot sector bad (either hard or floppy disk) Explanation: The system found a boot device, either …

Display type has changed since last boot If you have arrived here through a search engine, and there’s no menu to the left click here! Explanation: The BIOS POST has detected that the display type has changed since the last time the PC was booted (started), and there is a …

ROM Checksum Error If you have arrived here through a search engine, and there’s no menu to the left click here! Explanation: Some peripheral devices and expansion cards contain executable BIOS code stored in a ROM (Read Only Memory). The ROM has a checksum value in it that is used …

A20 Line or 8042 Gate Memory Errors If you have arrived here through a search engine, and there’s no menu to the left click here! Explanation: The system is detecting a failure trying to access the 21st address line, A20. This line is used to provide access to the high …

Display Switch is Set Incorrectly If you have arrived here through a search engine, and there’s no menu to the left click here! Explanation: Some older PCs (and we do mean older) have a switch on the motherboard that can be toggled between “monochrome” and “color”, instead of having a …

CMOS Display Type Mismatch If you have arrived here through a search engine, and there’s no menu to the left click here! Explanation: The system has detected that the type of video card actually installed in the PC is not the same as the one you selected in the BIOS …

Error Encountered Initializing Hard Drive If you have arrived here through a search engine, and there’s no menu to the left click here! Explanation: The BIOS POST process has detected a failure with one or more of the IDE/ATA hard disk drives in the system. The error appearing on the …

Keyboard Data Line Failure If you have arrived here through a search engine, and there’s no menu to the left click here! Explanation: The data line is one of the control lines between the keyboard and the keyboard controller that interfaces the keyboard to the motherboard. Early computers relied upon …

CMOS Checksum Error If you have arrived here through a search engine, and there’s no menu to the left click here! Note: Includes Checksum Error – Defaults Loaded and Checksum Failed Explanation: A checksum is an error-detecting code containing a numerical verification used to compare the BIOS settings stored in …

Memory Access Failures If you have arrived here through a search engine, and there’s no menu to the left click here! Explanation: The BIOS POST process detected a failure within the system memory. This usually means a failure of the simple memory tests performed at boot time, which generally consist …