What is the Test Patterns Tool primarily used for?

The Test Patterns Tool is primarily used to identify pixel anomalies in LCD panels. This tool enables technicians to display various color patterns and gradients on the screen, allowing for precise evaluation of the display's functionality. By visualizing how the pixel grid responds to the test patterns, any dead pixels, stuck pixels, or other visual discrepancies can be easily detected. This is critical in assessing the quality of the display and ensuring that it meets the standards for use.

Other options, while pertinent to general troubleshooting and diagnostics in different areas of technology, do not align with the specific function of the Test Patterns Tool. Identifying hardware failures, checking for software bugs, or diagnosing network issues requires different sets of tools and methodologies that are not the primary focus of the Test Patterns Tool.