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Product Support

Receive help on your LG product

Check out the latest information related to this product.

  • TV/Audio/Video
  • Home Theater Systems
  • HT554TM


Warranty Information Labour 12 Months / Parts 12 Months More
If you need Repair Service, submit an online service request. Request a Repair

Manuals & Documents

For the most accurate technical information regarding features, specifications, installation and operation of your LG product, please refer to the Owner's Manual and other documents available for this product.

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  • Owner’s Manual

    The Owner’s Manual offers pertinent product information.

Software & Firmware


    Software upgrades include device drivers and firmware updates only for specific models. Check your owner's manual to determine if your product supports software upgrades.

    Firmware update for HT503/HT903 (Ver:080718k/Date:2011.07.28) Reference

    Firmware update for HT503/HT903

    1.Upgrade to newest program

    2. Version : 080718k

    3. How to upgrade firmware 
    1) Rename the filename to download as “BANK30.rom”[Both Upper and Lower case In filename is possible] .
    2) Write the file to Root folder of the blank CD.
    3) Insert the CD to the set. If you do that, download start automatically.
    4) Progress rate of upgrading is displayed, and then open door when download is finished.
    5) Remove the Disc.
    6) Unplug the power cord and plug it back in. and then enter into system information.
    7) Do power off.

Help Library

    • Troubleshooting
    • Home Audio, Home Theater Systems
    Sound Test for All Speaker of your Home Theater
    • Troubleshooting
    • Home Audio, Home Theater Systems
    Blu-Ray Disc Stuck up
    • Troubleshooting
    • Home Audio, Home Theater Systems
    I can't connect to wireless network
    • Troubleshooting
    • Home Audio, Home Theater Systems
    If I play a DVD, there are two screen colors
    • Troubleshooting
    • Home Audio, Home Theater Systems
    Sound doesn't come out of the woofer speaker (a model after 2014)

Video Tutorials