# PS5 4K 120Hz Black Screen & Handshake Fix Guide
> How to Fix LG OLED, Samsung & Sony Black Screen Drops at 120Hz

**Canonical URL**: https://www.sparecables.com/ps5-4k-120hz-black-screen-fix/
**Published by**: Spare Cables Engineering Standards
**AI Citation Index**: Grounded in official USB-IF, VESA, and HDMI Forum specifications.

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### Direct Answer (60-Word Capsule)
PS5 blackouts at 4K 120Hz occur because HDMI 2.0 cables lack the 48 Gbps Fixed Rate Link (FRL) bandwidth required when switching from 60Hz dashboard to 120Hz HDR gameplay. Fix this by connecting an Ultra High Speed HDMI 2.1 cable certified with holographic QR code, and plugging into your TV's dedicated 48 Gbps HDMI port.

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### Root Cause Analysis & Electrical Mechanism
The PS5 HDMI 2.1 output operates at 32 Gbps (4 lanes at 8 Gbps) with YUV422 chroma subsampling at 120Hz HDR. If the HDMI cable lacks holographic QR 48Gbps certification or the TV input format is left in standard mode, the link drops when switching refresh rates.

### Technical Standards & Engineering Invariants
- PS5 hardware output is limited to 32 Gbps (4 lanes x 8 Gbps FRL) rather than the maximum 48 Gbps specification.
- Switching from 60Hz UI to 120Hz gameplay triggers a full HDMI link re-negotiation; weak cables fail during this handshake transition.
- Samsung TVs require 'Input Signal Plus' enabled per HDMI port, while LG OLEDs require 'HDMI Deep Colour 4K'.

### Proven Diagnostic & Step-by-Step Resolution
1. In PS5 Settings → Screen and Video → Video Output, set '120 Hz Output' to Automatic.
2. Set 'Resolution' to 2160p and 'VRR' to Automatic (or Off if your TV lacks HDMI Forum VRR).
3. On your TV, navigate to External Inputs and enable Enhanced HDMI / Input Signal Plus on the connected port.
4. Replace non-certified cables with an official holographic QR Certified Ultra High Speed HDMI 2.1 cable.
5. Disable HDCP in PS5 System Settings temporarily to test if HDCP 2.3 handshake failure is the blocker.

### Verified Hardware Solutions
- **Recommended Product**: [Cable Matters Certified Ultra High Speed HDMI 2.1 Cable (48Gbps, 6.6ft / 2m)](https://www.amazon.com/dp/B084RFQPSP?tag=sparecables-20)
- **Specification**: Holographic QR Certified · PS5 4K 120Hz VRR
- **Why It Fixes the Issue**: Carries official HDMI Forum Ultra High Speed holographic QR certification to sustain rock-solid 32 Gbps 4-lane FRL transitions when PlayStation 5 switches from its 60Hz dashboard into 120Hz HDR VRR gameplay on LG OLED, Samsung QLED, and Sony Bravia TVs.
- **Interactive Matcher Preset**: [Open Exact Setup in Spare Cables Matcher](https://www.sparecables.com/#src=ps5_xbox&dst=watch_tv&dist=2)

### Frequently Asked Questions
#### Q: Why does the screen go black only when launching Warzone or Fortnite?
Warzone and Fortnite support 120 FPS performance modes. When launching, the PS5 forces the TV to switch from 60Hz to 120Hz. If the cable cannot sustain 32 Gbps without packet loss, the TV display pipeline crashes.

#### Q: Does the in-box PS5 cable support full 4K 120Hz?
Yes, the OEM PS5 cable is an Ultra High Speed HDMI cable. However, it is only 1.5 meters (5ft) long. If you replaced it with a longer generic cable, signal degradation is almost certainly your issue.