Worked on the zephyr-testing repository to address a device tree issue affecting NXP boards, focusing on embedded systems reliability. Delivered a targeted bug fix by correcting the led2 color alias from red to blue in the DTS files for frdm_mcxa156, frdm_mcxa166, and frdm_mcxa276 boards. This change ensured accurate LED signaling, reducing the risk of misinterpreted hardware states and improving user experience for both developers and end users. Utilized device tree debugging, embedded systems knowledge, and Git version control to implement and document the patch, supporting maintainability and alignment with Zephyr development practices across multiple hardware platforms.