Dhww

These are hexadecimal values generated during the Power-On Self-Test. If the board fails to boot, a POST code card (connected to a PCI slot) can display these to identify the specific hardware component that failed.

While less common, "DHWW" appears in a few other niche contexts: These are hexadecimal values generated during the Power-On

The board uses audible beeps to signal errors if a video display is not yet available. For example: 3 beeps: Often indicates a memory (RAM) error. These are hexadecimal values generated during the Power-On