55U78G - Television HISENSE - Free user manual and instructions
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| Product Type | 4K ULED Smart Television |
| Brand | Hisense |
| Model | 55U78G |
| Screen Size | 55 inches (diagonal) |
| Display Technology | ULED (Quantum Dot LED) |
| Resolution | 3840 x 2160 (4K UHD) |
| Refresh Rate | 120 Hz (Native) |
| HDR Support | Dolby Vision, HDR10+, HLG |
| Smart Platform | Android TV 11 |
| Processor | Quad-core 64-bit |
| Audio Output | 2 x 10W (Dolby Atmos compatible) |
| HDMI Ports | 4 (HDMI 2.1, eARC, VRR) |
| USB Ports | 2 (USB 2.0) |
| Connectivity | Wi-Fi 5 (802.11ac), Bluetooth 5.0, Ethernet |
| Dimensions (W x H x D) with Stand | 1232 x 785 x 254 mm |
| Dimensions (W x H x D) without Stand | 1232 x 719 x 73 mm |
| Weight with Stand | 17.5 kg |
| Power Consumption (Typical) | 150 W |
| Power Supply | 100-240V AC, 50/60 Hz |
| VESA Mount | 400 x 200 mm |
| Warranty | 2 years (varies by region) |
Frequently Asked Questions - 55U78G HISENSE
How do I set up the TV for the first time?
Plug in the power, connect antennas or devices, and turn on the TV. Follow the on-screen Android TV setup wizard to select language, connect to Wi-Fi, sign in to Google account, and complete channel scan if using antenna.
How can I connect external devices like a soundbar or gaming console?
Use the HDMI ports on the back. For best audio, connect to the HDMI eARC port. For gaming, enable HDMI 2.1 features like VRR and ALLM in settings.
Why is the picture not clear or blurry?
Check your source quality, ensure the TV is set to the correct resolution (4K if available). Adjust picture settings (Menu > Picture) like sharpness, noise reduction, or try different picture modes (Standard, Cinema, Game). Also check HDMI cable version.
How do I update the TV firmware?
Go to Settings > Device Preferences > About > System Update. The TV will check for updates over Wi-Fi. Ensure it is connected to the internet. You can also update via USB by downloading firmware from the Hisense support site.
The remote control is not working. What can I do?
First, replace the batteries. If still not working, try pairing the remote: press and hold the Home and Back buttons for 3 seconds. If it's a Bluetooth remote, ensure Bluetooth is enabled on the TV. Alternatively, use the mobile app Hisense RemoteNow.
Can I mount the TV on a wall?
Yes, the TV is VESA compatible with 400 x 200 mm mounting holes. Use a suitable wall mount rated for at least 20 kg. Remove the stand before mounting.
How to clean the screen?
Use a soft, dry microfiber cloth. For stubborn stains, slightly dampen the cloth with water or a screen-safe cleaner. Do not spray directly onto the screen. Wipe gently from side to side.
Why is there no sound from the TV?
Check if mute is on or volume too low. Verify audio output settings (Settings > Sound > Speakers). If using external speakers, ensure they are properly connected and powered. Try a power cycle (unplug for 30 seconds).
How do I enable Game Mode?
When a gaming console is connected via HDMI, the TV may automatically switch to Game Mode. Or go to Settings > Picture > Picture Mode and select Game. This reduces input lag for a smoother experience.
The TV keeps restarting or freezing. What should I do?
Try a soft reset: unplug the TV from power for 1 minute, then plug back in. If issue persists, check for software updates (Settings > About > System Update). Factory reset (Settings > Device Preferences > Reset) as last resort, but back up your data.
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