🚨 Root Cause & Troubleshooting Guide

4K 120Hz HDMI Signal Loss & Black Flashes on OLED TV / PS5 Fix

Identified Root Cause:
Using legacy HDMI 2.0 (18Gbps max) cable for 4K 120Hz HDR 10-bit 4:4:4 which requires 40.0+ Gbps throughput.

Step-by-Step Diagnostic & Resolution:

Verify TV port: Ensure cable is plugged into specific HDMI 2.1 ports (typically ports 3 or 4 labeled "4K@120Hz / eARC").

Enable "HDMI Enhanced Format" or "Ultra HD Deep Color" in TV input settings.

Inspect cable jacket for official "Ultra High Speed HDMI" hologram QR certification code.

Replace uncertified extension adapters with a continuous certified 48Gbps HDMI 2.1 cable.

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Anker Ultra High Speed 8K HDMI 2.1 & DisplayPort Certified Cable (48Gbps)

Official HDMI Forum certified, supports 4K 144Hz, 8K 60Hz, Dynamic HDR, and eARC.

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