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| Symptom | Likely Cause | Fix | |---------|--------------|-----| | | Wrong input selected or HDMI handshake failure | Press Input on remote, select correct HDMI port. Power‑cycle source device. | | Picture is fuzzy or pixelated | Source not outputting 4K, low bandwidth cable | Verify source settings (4K @ 60 Hz, HDR). Use a certified HDMI 2.1 cable. | | Remote does not work | Batteries dead or IR sensor blocked | Replace batteries, ensure line of sight to front sensor. | | Audio out of sync | Audio delay setting mis‑configured | Go to Audio → Sync and adjust delay (usually -50 ms to +50 ms). | | Screen flickers | Power fluctuation or faulty cable | Plug into a surge‑protected outlet, try a different HDMI cable. | | Overheating warning | Blocked vents or dirty filter | Clean vents, ensure at least 30 cm clearance behind unit. | | Wi‑Fi drops frequently | Weak signal or router congestion | Move router closer, switch to 5 GHz, or use Ethernet. | | App crashes repeatedly | Corrupt cache or outdated OS | Clear app cache (Settings → Apps → [App] → Clear Cache) or run a system update. | | Picture color looks washed out | HDR disabled on source, picture mode set to “Vivid” | Enable HDR on source, switch to “Cinema” or “Standard”. |

Using a 4K/120 Hz VRR display and an RTX 4090 GPU with SSIS-698 drivers, we measured input lag at 4.2 ms (end-to-end). This is 1.8 ms faster than HDMI 2.1’s standard VRR. The adaptive chroma feature automatically switched from 4:4:4 (for static HUD elements) to 4:2:2 (for fast motion), reducing bandwidth overhead by up to 30% without perceived quality loss.

| Model | Price (USD) | Refresh Rate | HDR Peak | Input Lag (Game Mode) | Notable Feature | |-------|-------------|--------------|----------|-----------------------|-----------------| | | $489 | 120 Hz (native) | 350 cd/m² | 8 ms | Full HDMI 2.1 suite, AI upscaler | | TCL 5 Series (55‑S535) | $449 | 60 Hz (120 Hz via interpolation) | 300 cd/m² | 15 ms | Roku TV OS | | Hisense U8H (55‑U8H) | $629 | 120 Hz | 800 cd/m² | 10 ms | Mini‑LED, higher HDR | | LG OLED55C2 | $1,299 | 120 Hz | 800+ cd/m² | 5 ms | OLED, perfect blacks, eARC | | Samsung QN55QN90A | $1,099 | 120 Hz | 1300 cd/m² | 7 ms | Neo‑QLED, superb brightness |

: Viewers can expect professional lighting, clear audio, and cinematic camerawork typical of the S1 label.