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NO SIGNAL

LG TV & Audio · 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV

LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV NO SIGNAL Error Fix: HDMI No Signal Detected

The TV displays "No Signal" on the selected HDMI input. Check that the external device is powered on. Try a different HDMI cable (use Ultra High Speed HDMI for 4K/120Hz). Try a different HDMI port. Check HDMI port settings: Settings → General → Devices → HDMI Settings → ensure correct HDMI mode (Standard vs Enhanced/4K).

Medium severity2 fixes available

Quick Answer

Error NO SIGNAL on the LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV means: HDMI No Signal Detected. The top-ranked community fix is “Inspect and Repair HDMI Port or Replace Main Board” (hard difficulty, ~120 min, DIY cost: $0-$30). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · tv

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many tv repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $200-$400.

Other LG TV & Audio Models with Error NO SIGNAL

75NANO75UQA 75" Class NanoCell 75 Series 4K Smart TV

tv · 2 fixes

86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV

tv · 2 fixes

OLED55B3PUA 55" Class B3 4K OLED Smart TV

tv · 2 fixes

OLED65C3PUA 65" Class C3 4K OLED evo Smart TV

tv · 2 fixes

OLED65C4PUA 65" Class C4 4K OLED evo Smart TV

tv · 2 fixes

OLED65G3PUA 65" Class G3 4K OLED evo Gallery Edition Smart TV

tv · 2 fixes

Other LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV Error Codes

APP CRASH

App Freezes or Crashes

2 fixes

AUDIO SYNC

Audio Out of Sync with Video

2 fixes

BACKLIGHT BLEED

Backlight Bleeding / Clouding

2 fixes

BACKLIGHT FAILURE

LED Backlight Strip Failure — No Picture

2 fixes

BACKLIGHT STRIP FAIL

LED Backlight Strip Physical Failure

2 fixes

BANDING

Horizontal or Vertical Banding

2 fixes

BLINK 2X

Power Supply Overcurrent / Short

2 fixes

BLINK 3X

Main Board Failure

2 fixes

People Also Ask About LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV Error NO SIGNAL

What does error code NO SIGNAL mean on a LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV?

Error code NO SIGNAL on the LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV means: HDMI No Signal Detected. The TV displays "No Signal" on the selected HDMI input. Check that the external device is powered on. Try a different HDMI cable (use Ultra High Speed HDMI for 4K/120Hz). Try a different HDMI port. Check HDMI port settings: Settings → General → Devices → HDMI Settings → ensure correct HDMI mode (Standard vs Enhanced/4K).

How do I fix error code NO SIGNAL on my LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV?

The most successful fix is "Inspect and Repair HDMI Port or Replace Main Board" (hard difficulty, ~120 minutes). Estimated DIY cost: $0-$30. HomeMD has 2 community-ranked fixes for this error.

Is error code NO SIGNAL on a LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV error NO SIGNAL myself?

Yes — the top-ranked community fix ("Inspect and Repair HDMI Port or Replace Main Board") is rated hard difficulty and takes about 120 minutes. Tools needed: T20 Torx screwdriver, Compressed air can, Tweezers, Anti-static wrist strap.

How much does it cost to repair LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV error NO SIGNAL?

DIY cost: $0-$30. Professional repair typically costs $200-$400. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV have?

The LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV has 8 other known error codes, including: APP CRASH (App Freezes or Crashes), AUDIO SYNC (Audio Out of Sync with Video), BACKLIGHT BLEED (Backlight Bleeding / Clouding), BACKLIGHT FAILURE (LED Backlight Strip Failure — No Picture), BACKLIGHT STRIP FAIL (LED Backlight Strip Physical Failure), and 3 more.

Which other LG TV & Audio models have the NO SIGNAL error?

Error code NO SIGNAL also appears on 6 other LG TV & Audio models: 75NANO75UQA 75" Class NanoCell 75 Series 4K Smart TV, 86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV, OLED55B3PUA 55" Class B3 4K OLED Smart TV, OLED65C3PUA 65" Class C3 4K OLED evo Smart TV, OLED65C4PUA 65" Class C4 4K OLED evo Smart TV, OLED65G3PUA 65" Class G3 4K OLED evo Gallery Edition Smart TV. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV have?

The LG TV & Audio 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV has 8 other known error codes:

APP CRASH — App Freezes or Crashes (2 fixes)
AUDIO SYNC — Audio Out of Sync with Video (2 fixes)
BACKLIGHT BLEED — Backlight Bleeding / Clouding (2 fixes)
BACKLIGHT FAILURE — LED Backlight Strip Failure — No Picture (2 fixes)
BACKLIGHT STRIP FAIL — LED Backlight Strip Physical Failure (2 fixes)
BANDING — Horizontal or Vertical Banding (2 fixes)
BLINK 2X — Power Supply Overcurrent / Short (2 fixes)
BLINK 3X — Main Board Failure (2 fixes)

Which other LG TV & Audio models have the NO SIGNAL error?

Error code NO SIGNAL also appears on 6 other LG TV & Audio models:

75NANO75UQA 75" Class NanoCell 75 Series 4K Smart TV (tv) · 2 fixes
86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV (tv) · 2 fixes
OLED55B3PUA 55" Class B3 4K OLED Smart TV (tv) · 2 fixes
OLED65C3PUA 65" Class C3 4K OLED evo Smart TV (tv) · 2 fixes
OLED65C4PUA 65" Class C4 4K OLED evo Smart TV (tv) · 2 fixes
OLED65G3PUA 65" Class G3 4K OLED evo Gallery Edition Smart TV (tv) · 2 fixes

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