55UR78003LK - TV LG - Free user manual and instructions
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| Product Type | 4K UHD Smart LED TV |
| Screen Size | 55 inches (diagonal) |
| Resolution | 3840 x 2160 (4K UHD) |
| Display Technology | LED (Direct Lit) |
| Refresh Rate | 60 Hz (Native) |
| Smart Platform | webOS 23 |
| Processor | α5 Gen6 AI Processor 4K |
| Dimensions (with stand) | 1235 x 780 x 260 mm |
| Dimensions (without stand) | 1235 x 715 x 57.1 mm |
| Weight (with stand) | 16.8 kg |
| Weight (without stand) | 14.2 kg |
| Power Consumption (Max) | 150 W |
| Standby Power | <0.5 W |
| Energy Efficiency Class | G (EU) |
| HDMI Ports | 3 (HDMI 2.0) |
| USB Ports | 2 (USB 2.0) |
| Ethernet (LAN) | 1 |
| Wi-Fi | Wi-Fi 5 (802.11ac) |
| Bluetooth | Bluetooth 5.0 |
| Tuner | DVB-T2/C/S2 |
| Remote Control | LG Magic Remote (MR23GA) |
| Wall Mount VESA | 300 x 300 mm |
| Warranty | 2 years (EU) |
| Package Contents | TV, Remote, Batteries, Power Cable, Quick Guide |
Frequently Asked Questions - 55UR78003LK LG
How do I connect my LG 55UR78003LK to Wi-Fi?
Go to Settings > Network > Wi-Fi Connection. Select your network and enter the password using the on-screen keyboard. For help, refer to the network section in the manual.
What is the best picture mode for movies?
For movies, select Cinema or Filmmaker Mode from the picture mode settings. These modes preserve the original colors and reduce motion smoothing. You can find them under Settings > Picture > Picture Mode.
How do I perform a factory reset?
Press the Settings button on your remote, go to All Settings > General > Reset to Initial Settings. Confirm with the remote. This will erase all personal data and settings.
My TV screen is flickering—what should I do?
First, check the power cable connection and try a different outlet. If the problem persists, go to Settings > Picture and adjust Backlight or disable Energy Saving. A loose HDMI cable can also cause flickering.
Can I wall mount this TV?
Yes, the LG 55UR78003LK is VESA compatible with 300 x 300 mm mounting pattern. Use a wall mount rated for at least 40 kg. Ensure the wall can support the weight.
How do I update the software?
Go to Settings > All Settings > General > About This TV > Check for Updates. If available, follow the on-screen instructions. Keep your TV connected to the internet.
The remote is not working—how to fix?
Check the batteries (replace if needed) and ensure nothing blocks the IR sensor on the TV. For the Magic Remote, try pairing again by pressing the Home and Back buttons simultaneously.
How do I connect Bluetooth headphones?
Go to Settings > Sound > Sound Out > Bluetooth. Enable pairing on your headphones and select them from the list. Volume control is via the TV remote.
What is the power consumption in standby?
The standby power consumption is less than 0.5 watts. To save more energy, unplug the TV when not in use for extended periods. You can also enable Auto Power Off in settings.
Can I use USB to play media files?
Yes, insert a USB drive with FAT32 or NTFS format. Supported file types include MP4, MKV, AVI, JPEG, and MP3. Open the Media Player app from the home screen to access files.
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USER MANUAL 55UR78003LK LG
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Product information
Brand : LG
Model : 55UR78003LK
Category : TV