no-signal Troubleshooting

No signal / black screen on the LG C3 OLED

Source: Samsung TV support — no signal / HDMI Confidence: 90% Verified Aug 9, 2026

The TV or monitor shows no signal, often from an HDMI issue or a wrong input.

How to fix No signal / black screen

Check the input source

Cycle through the inputs and ensure the correct source is selected.

Source: ProductDB enrichment catalog Confidence: 80% Verified Aug 8, 2026
Difficulty: ★ Est. 3 min

Reseat the HDMI cable

Unplug and reseat the HDMI cable on both ends, or try a different cable.

Source: ProductDB enrichment catalog Confidence: 80% Verified Aug 8, 2026
Difficulty: ★ Est. 5 min

Check the HDMI connection

Ensure the HDMI cable is fully seated in both the TV and the source device.

Source: Samsung TV support — no signal / HDMI Confidence: 90% Verified Aug 9, 2026
Difficulty: ★ Est. 3 min

Parts needed: LG C3 OLED HDMI Cable, LG UltraGear 27GN950 HDMI Cable, LG UltraGear 27GP850 HDMI Cable

Select the correct input

Change the TV input to match the port the source device is connected to.

Source: Samsung TV support — no signal / HDMI Confidence: 90% Verified Aug 9, 2026
Difficulty: ★ Est. 2 min

Replacement parts for the LG C3 OLED

LG C3 OLED Remote Control LG C3 OLED Stand LG C3 OLED Power Cable LG C3 OLED Wall Mount LG C3 OLED HDMI Cable LG UltraGear 27GN950 Wall Mount LG UltraGear 27GN950 HDMI Cable LG UltraGear 27GP850 Wall Mount LG UltraGear 27GP850 HDMI Cable LG 43lr60006 Wall Mount LG 43lr60006 HDMI Cable LG OLED65C5ELB Wall Mount LG OLED65C5ELB HDMI Cable LG 55UA75006LA Wall Mount LG 55UA75006LA HDMI Cable LG OLED48B59LA Wall Mount LG OLED48B59LA HDMI Cable LG 32LQ63806LC Wall Mount LG 32LQ63806LC HDMI Cable LG 55NANO80A6B Wall Mount LG 55NANO80A6B HDMI Cable LG OLED65C5ELB Wall Mount LG OLED65C5ELB HDMI Cable LG 55UA75006LA Wall Mount LG 55UA75006LA HDMI Cable LG OLED48B59LA Wall Mount LG OLED48B59LA HDMI Cable LG 32LQ63806LC Wall Mount LG 32LQ63806LC HDMI Cable LG 55NANO80A6B Wall Mount LG 55NANO80A6B HDMI Cable LG 43lr60006 Wall Mount LG 43lr60006 HDMI Cable LG OLED65C5ELB Wall Mount LG OLED65C5ELB HDMI Cable LG Ultragear™ 45GX950A-B.AEU 21:9 Curved 800R 5K2K OLED Wall Mount LG Ultragear™ 45GX950A-B.AEU 21:9 Curved 800R 5K2K OLED HDMI Cable

← All LG C3 OLED error codes

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