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Nick's Electronics Repair

LG OLED77C1AUB EBT66634903 (EAX69532304) Upgraded Mainboard

LG OLED77C1AUB EBT66634903 (EAX69532304) Upgraded Mainboard

$339.00 USD
$339.00 USD
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LG OLED77C1AUB EBT66634903 (EAX69532304) Upgraded Mainboard

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Your TV probably needs this board if you see any of these symptoms:

  • TV is dead / No power
  • TV has power, but won't turn on
  • TV Shuts itself off as if it's overheating
  • HDMI failure
  • TV turns on but is stuck on Logo
  • Other symptoms? Fill out the form and a tech will confirm if this board is right.

  • Why this upgraded board outlasts the original

    Buy once, fix it for good. Our upgraded mainboard for the LG OLED runs cooler and lasts longer than stock, and is backed by a full 1-year warranty.

    What makes it outlast standard boards:

    • Copper shim + MX-4: We add a precision copper plate between the CPU die and heatsink and upgrade the paste to MX-4 for better heat transfer.
    • Dual-sided cooling: We install a high-end thermal pad on the underside so the TV chassis acts like a giant heatsink, pulling heat from both sides.
    • Proven in the field: Over 200 mainboards shipped for this model, with only 2 boards returned over 2 years. Real-world reliability you can feel good about.

    What you get:

    • Plug-and-play replacement mainboard
    • 1-year warranty (replace or refund if it fails under normal use)
    • Fast shipping from our U.S. facility

Important Notice

  • The upgraded board may look slightly different and may not have the AV port. It is still fully compatible with your TV.
  • Your Magic Wand remote will not work after this mainboard is installed and there is no way to change that.
  • Your TV will still work with a standard LG remote. If you need one, you can buy a compatible remote using the link below.
    Link to remote