The LG B4 OLED sits as the entry point into LG's 2024 OLED television lineup, offering self-lit pixel technology and infinite contrast at a more accessible price point than the mid-tier C4 or flagship G4 models. Powered by LG's Alpha 8 AI Processor, the B4 represents a notable step forward over its predecessors. Most significantly, LG expanded the B-series connectivity to include four full-bandwidth HDMI 2.1 ports, aligning its gaming capabilities with higher-tier display models and making it a strong candidate for high-frame-rate console and PC gaming alongside 4K HDR media playback. Designed for home theater viewers and gamers who prioritize pitch-black levels, accurate color rendering, and low input lag, the B4 supports Dolby Vision, HDR10, variable refresh rate (VRR), and 120Hz output. Operating on LG’s webOS smart platform, the set integrates native streaming applications and smart home controls. While its picture performance excels in light-controlled or dark environments, its lower peak HDR brightness relative to bright-room OLED panels like the higher-end C-series requires thoughtful placement away from direct glare. Despite high panel quality, long-term ownership of the LG B4 involves monitoring for common electronic and display degradation patterns. Power supply unit (PSU) failures are among the most frequent hardware issues in modern flat-panel displays, typically presenting as a clicking internal relay, failure to power on from standby, or sudden thermal shutdowns. Main board failures can manifest as lost HDMI input handshakes, intermittent Wi-Fi module disconnects, or operating system boot loops. Furthermore, while automated pixel refresh software mitigates image retention, OLED panel burn-in remains a structural consideration under prolonged static image conditions, alongside potential panel drive errors like horizontal screen lines or dark vertical bands. LML Repair provides clear reference materials and diagnostic guides to help owners, technicians, and electronics buyers evaluate the LG B4 OLED. Use this hub to check hardware behavior, research common display and mainboard faults, examine model comparisons within the LG OLED lineup, and find practical teardown and maintenance documentation. content-hub-overview-v1