Which error code would indicate a faulty video adapter during POST?

The error code that indicates a faulty video adapter during the Power-On Self-Test (POST) is indeed associated with the 4xx range. During POST, the system performs a series of checks to determine if the hardware components are functioning correctly. When a specific issue arises with the video adapter, the BIOS will generate an error code, and in this case, codes in the 4xx range are typically designated for video-related errors.

The significance of these codes is that they help diagnose problems early in the boot process, before the operating system loads. A failure related to the video adapter can prevent the display from functioning altogether, signaling to the user that there may be an issue with the graphics hardware or its connections to the motherboard.