Does the 55SJ8500 work with RemotApp?
Yes. The 55SJ8500 runs webOS 3.5, and RemotApp controls it over Wi-Fi with no setup beyond accepting the connection on the TV once.
- Remote over Wi-Fi Yes
- Infrared (Android with IR) Yes
- Send photos and videos Yes
- Turn on from the phone Yes
Protocol: LG webOS (SSAP 3000/3001)
What the code 55SJ8500 means
TV model codes follow the maker’s naming rules. Reading it piece by piece:
55Screen size in inchesSJ8500Series (2017 line) · NanoCell
55SJ8500 specifications
Display
| Display diagonal | 138.7 cm (54.6") |
|---|---|
| HD type | 4K Ultra HD |
| Display technology | LED |
| Screen shape | Flat |
| Supported video modes | 2160p |
| Supported graphics resolutions | 3840 x 2160 |
| Motion interpolation technology | TruMotion 120 Hz |
| Native refresh rate | 60 Hz |
| Display resolution | 3840 x 2160 pixels |
Smart TV
| Smart TV | Yes |
|---|---|
| Operating system installed | WebOS |
| Operating system version | webOS 3.5 |
Audio
| Number of speakers | 1 |
|---|---|
| RMS rated power | 20 W |
| Built-in subwoofer | Yes |
| Subwoofer RMS power | 20 W |
| Audio decoders | DTS, DTS-HD |
Network
| Wi-Fi | Yes |
|---|---|
| Wi-Fi standards | Wi-Fi 5 (802.11ac) |
| Ethernet LAN | Yes |
| Wi-Fi Direct | Yes |
| Web browser | Yes |
Design
| Product colour | White |
|---|---|
| VESA mounting | Yes |
| Panel mounting interface | 300 x 300 mm |
Performance
| High Dynamic Range (HDR) technology | Hybrid Log-Gamma (HLG) |
|---|---|
| Backlight dimming technology | Local Dimming |
| High Dynamic Range (HDR) supported | Yes |
Ports & interfaces
| PC in (D-Sub) | No |
|---|---|
| DVI port | No |
| Ethernet LAN (RJ-45) ports | 1 |
| USB 2.0 ports quantity | 3 |
| Composite video in | 1 |
| Digital audio optical out | 1 |
| RS-232C ports | 1 |
| RF ports quantity | 1 |
| HDMI ports quantity | 4 |
| Consumer Electronics Control (CEC) | SimpLink |
Power
| Power consumption (standby) | 0.5 W |
|---|---|
| AC input voltage | 100 - 240 V |
| AC input frequency | 50 - 60 Hz |
Operational conditions
| Operating temperature (T-T) | 0 - 40 °C |
|---|
Weight & dimensions
| Width (with stand) | 1229.3 mm |
|---|---|
| Height (with stand) | 764.5 mm |
| Weight (with stand) | 19.5 kg |
| Width (without stand) | 1229.3 mm |
| Depth (without stand) | 58.4 mm |
| Height (without stand) | 708.6 mm |
| Weight (without stand) | 18.1 kg |
Other features
| Hybrid Log-Gamma (HLG) | Yes |
|---|---|
| 3D | No |
| Built-in speaker(s) | Yes |
| Storage temperature (T-T) | -20 - 60 °C |
| Operating relative humidity (H-H) | 0 - 80% |
| Storage relative humidity (H-H) | 0 - 85% |
| App store | LG Content Store |
Technical data: Open Icecat and the manufacturer. Check the official page before buying; specs can vary by batch and market.
How to control the 55SJ8500 with your phone
- Connect your phone to the same Wi-Fi network as the TV. (Not the guest network.)
- Turn the TV on and install RemotApp on your phone.
- Open RemotApp. It finds the TVs on your network by itself; tap your LG TV.
- The TV shows a connection request from RemotApp. Select “Accept”.
- Tap Volume + to test. That’s it: your phone is now the remote.
Full guide for LG TVs, with fixes when it won’t connect
Turning the 55SJ8500 on without the remote
Turn on “Mobile TV On” (or “Turn on via Wi-Fi”), usually under Settings › General › Devices. The TV then accepts a wake-up signal from your phone while in standby.
Questions about the 55SJ8500
Can I control the LG 55SJ8500 with my phone?
Yes. The 55SJ8500 runs webOS 3.5, and RemotApp controls it over Wi-Fi with no setup beyond accepting the connection on the TV once.
What year is the LG 55SJ8500?
The 55SJ8500 is part of LG’s 2017 line (NanoCell SJ8500).
What operating system does the 55SJ8500 use?
The 55SJ8500 runs webOS 3.5.
How many HDMI ports does the 55SJ8500 have?
The 55SJ8500 has 4 HDMI ports.
Turning the 55SJ8500 on without the remote
Turn on “Mobile TV On” (or “Turn on via Wi-Fi”), usually under Settings › General › Devices. The TV then accepts a wake-up signal from your phone while in standby.