Board Number: EBT66611604
LG MFR Part Number: EBU66313001
Substitute Board: EBT66642903
Location: B16

Product Description

This LG Main Board is an original replacement control board used in select LG OLED C1 Series TVs. The main board controls all core TV functions, including video processing, HDMI inputs, audio output, Wi-Fi, and smart TV features.

The OLED65C1 and OLED55C1 use the same main board and are fully interchangeable. This compatibility has been verified using official LG service documentation and hands-on service experience. We are an LG Authorized Service Center, ensuring accurate, manufacturer-verified technical information.

Important Compatibility Notice

• OLED55C1 and OLED65C1 share the same main board
• Boards are fully interchangeable between these models
• Verified by an LG Authorized Service Center

Board Numbers & Substitution

• Primary Board Number: EBT66611604
• LG Manufacturer Part Number: EBU66313001
• Approved Substitute: EBT66642903

📦 You will receive either EBT66611604 or EBT66642903, whichever is available.
Both boards are functionally equivalent and approved replacements.

Known Compatible Models

• OLED55C1PUB.DUSQLJR
• OLED55C1AUB.DUSQLJR
• OLED65C1AUB.BUSYLJR

⚠️ Important: Always verify the board number printed on your original main board before ordering.

Common Problems This Board Fixes

• TV will not power on
• No picture or no sound
• HDMI ports not working
• TV stuck on logo or boot loop
• No network / Wi-Fi / smart features
• Random shutdowns or freezing