A damaged, loose, or low-quality HDMI cable can easily cause screen flickering, signal dropouts, or complete blackouts on a computer monitor or television. High-definition multimedia interface (HDMI) cables transmit massive amounts of digital video data at high frequencies; if the internal copper conductors are compromised, the connectors are bent, or the cable lacks sufficient bandwidth rating (such as failing to support high refresh rates like 4K at 120Hz), signal packet loss occurs, resulting in annoying visual blinking or intermittent display instability.
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