📺Television

E03

TCL · 6-Series R655 Mini-LED

TCL 6-Series R655 Mini-LED E03 Error Fix: T-Con Board Communication Failure

This error signals a failure in communication between the main board and the T-Con (Timing Controller) board. It may cause screen flickering, vertical/horizontal lines, or no image display.

High severity2 fixes available

Quick Answer

Error E03 on the TCL 6-Series R655 Mini-LED means: T-Con Board Communication Failure. The top-ranked community fix is “Replace T-Con Board” (medium difficulty, ~45 min, DIY cost: $40-$70). 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.

Root Cause Analysis

Control Board FailurePrimary

Electrical Fault → Wiring Harness Damaged

When to Call a Professional

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

This is a high severity error — continued use may cause damage or a safety hazard
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: $140-$210.

Other TCL Models with Error E03

4-Series S446 4K

tv · 2 fixes

5-Series S546 QLED

tv · 2 fixes

Alto 8+ 2.1 Channel Soundbar with Wireless Subwoofer and Bluetooth Connectivity

soundbar · 2 fixes

Q-Series Q6510 QLED

tv · 2 fixes

Other TCL 6-Series R655 Mini-LED Error Codes

E01

Backlight Failure

2 fixes

E02

Panel Temperature Sensor Error

2 fixes

E04

Power Supply Voltage Out of Range

2 fixes

E05

Wi-Fi Module Not Responding

2 fixes

E06

Audio System Malfunction

2 fixes

E07

HDMI Port Initialization Error

2 fixes

E08

Firmware Corruption Detected

2 fixes

E09

IR Sensor Failure

2 fixes

People Also Ask About TCL 6-Series R655 Mini-LED Error E03

What does error code E03 mean on a TCL 6-Series R655 Mini-LED?

Error code E03 on the TCL 6-Series R655 Mini-LED means: T-Con Board Communication Failure. This error signals a failure in communication between the main board and the T-Con (Timing Controller) board. It may cause screen flickering, vertical/horizontal lines, or no image display.

How do I fix error code E03 on my TCL 6-Series R655 Mini-LED?

The most successful fix is "Replace T-Con Board" (medium difficulty, ~45 minutes). Estimated DIY cost: $40-$70. HomeMD has 2 community-ranked fixes for this error.

Is error code E03 on a TCL 6-Series R655 Mini-LED serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix TCL 6-Series R655 Mini-LED error E03 myself?

Yes — the top-ranked community fix ("Replace T-Con Board") is rated medium difficulty and takes about 45 minutes. Tools needed: Phillips screwdriver.

How much does it cost to repair TCL 6-Series R655 Mini-LED error E03?

DIY cost: $40-$70. Professional repair typically costs $140-$210. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the TCL 6-Series R655 Mini-LED have?

The TCL 6-Series R655 Mini-LED has 8 other known error codes, including: E01 (Backlight Failure), E02 (Panel Temperature Sensor Error), E04 (Power Supply Voltage Out of Range), E05 (Wi-Fi Module Not Responding), E06 (Audio System Malfunction), and 3 more.

Which other TCL models have the E03 error?

Error code E03 also appears on 4 other TCL models: 4-Series S446 4K, 5-Series S546 QLED, Alto 8+ 2.1 Channel Soundbar with Wireless Subwoofer and Bluetooth Connectivity, Q-Series Q6510 QLED. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the TCL 6-Series R655 Mini-LED have?

The TCL 6-Series R655 Mini-LED has 8 other known error codes:

E01 — Backlight Failure (2 fixes)
E02 — Panel Temperature Sensor Error (2 fixes)
E04 — Power Supply Voltage Out of Range (2 fixes)
E05 — Wi-Fi Module Not Responding (2 fixes)
E06 — Audio System Malfunction (2 fixes)
E07 — HDMI Port Initialization Error (2 fixes)
E08 — Firmware Corruption Detected (2 fixes)
E09 — IR Sensor Failure (2 fixes)

Which other TCL models have the E03 error?

Error code E03 also appears on 4 other TCL models:

4-Series S446 4K (tv) · 2 fixes
5-Series S546 QLED (tv) · 2 fixes
Alto 8+ 2.1 Channel Soundbar with Wireless Subwoofer and Bluetooth Connectivity (soundbar) · 2 fixes
Q-Series Q6510 QLED (tv) · 2 fixes

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