The Samsung Q80C occupies a key mid-to-high position within Samsung’s 2023 QLED television lineup. Situated above the edge-lit Q60C and Q70C models, but just below the Mini-LED-equipped Neo QLED series (such as the QN85C), the Q80C is tailored for users who want true local dimming without stepping up to Mini-LED price points. Utilizing a Direct Full Array LED backlight paired with Samsung's Quantum Processor 4K, the Q80C offers high peak brightness, a native 120Hz refresh rate, and full HDMI 2.1 features across its ports, making it a popular choice for modern gaming consoles and bright-room media viewing. From an internal construction standpoint, the Q80C uses a traditional three-board architecture: a dedicated power supply unit (PSU), a main system board hosting the Tizen OS SoC and AV inputs, and a timing controller (T-Con) board driving the 4K panel. Larger variants or specific regional builds may integrate the T-Con functions directly into the main board or panel driver strips. The television also incorporates a bottom-mounted Wi-Fi/Bluetooth module connected via a internal ribbon cable and relies on Samsung's rechargeable SolarCell remote for wireless navigation. In long-term ownership, several common failure modes and hardware symptoms present on the Q80C platform. Backlight array degradation is among the most notable: individual Direct Full Array LED strips can overheat or burn out over time, resulting in dark horizontal bands, localized dimming patches, or a complete loss of display illumination while sound remains active. Power board failures typically manifest as a continuous boot-looping sequence (where the standby LED flashes rhythmically) or a complete failure to turn on. Additionally, main board issues can produce HDMI eARC audio sync dropouts, persistent Wi-Fi disconnections caused by module ribbon cable oxidation, or system lockups within the Tizen smart interface. LML Repair serves as an open technical reference for the Samsung Q80C and related QLED models. Readers can use this site to research hardware specifications, compare models across the Samsung TV ecosystem, identify board-level symptoms, and follow step-by-step troubleshooting guides to isolate faults before attempting component replacements or repairs. content-hub-overview-v1