LG 55SE3DD (Discontinued) · Replacements in Qatar

Name: LG 55SE3DD 55-inch Full HD Standard Signage Display
Brand: LG
SKU: lg-55se3dd
Availability: Discontinued

Overview

The LG 55SE3DD is a 55-inch Full HD signage display with 300 nits typical brightness, and the manufacturer has discontinued this model. It suits corridors, lobbies and waiting areas in offices, schools and hotels that need simple, scheduled content. Slim 11.9 mm side bezels suit tiled or wall-mounted layouts. Owners and buyers comparing options can request a quote for a current equivalent from SmartRooms Qatar.

What the LG 55SE3DD is and who still needs it

The LG 55SE3DD is a 55-inch standard signage display from the SE3D series, built to show information and promotional content on a non-touch screen. Its 1,920 x 1,080 Full HD panel has a typical brightness of 300 nits. LG has discontinued this model, so this page is written for three groups: organisations that already run one, buyers comparing it with newer signage, and anyone seeking a like-for-like replacement in Qatar.

Playback, control and connectivity

The display offers two HDMI inputs, an analog RGB input, an audio input, a USB port and an external speaker output. Content can be loaded, played and scheduled from USB without a content server, and when a media player is disconnected the screen can show a preset image stored on USB instead. For control and monitoring, the unit has RS232C in and out, an RJ45 port, an IR receiver and SNMP support for network management. Wi-Fi content distribution requires the optional AN-WF500 USB dongle.

Build details for hot, dusty and busy spaces

Conformal coating on the circuit board protects against dust, iron powder and humidity.
Slim frame: 11.9 mm side and top bezels, an 18 mm bottom bezel and a 38.6 mm depth.
Portrait mode lets you position the logo for vertical installations.
Screen transition helps prevent residual images on long-running content.

The rated operating range is 0°C to 40°C with 10% to 80% humidity. Qatar summer temperatures can exceed 45°C, so keep the unit in air-conditioned indoor spaces rather than sun-exposed or outdoor areas.

Where it fits in Qatar

A private school in Al Wakrah could place one in a corridor to show timetables and event notices, with the playlist loaded from USB so no server is needed. A clinic in Al Sadd might use one in a waiting area to show appointment reminders and health messages timed by hour. A hotel in West Bay could fit a panel in a lobby, where 300 nits typical brightness suits indoor lighting, provided it is kept out of direct sunlight through glass.

Planning the installation

The head weighs 17.1 kg and measures 1,238 x 714.9 x 38.6 mm, with a 300 x 300 mm VESA mounting pattern. Optional accessories include the ST-492T stand, the LSW350B wall bracket, the AM-B330S VESA adapter and the SP-5000 speaker. The unit does not accept OPS modules, but an external MP500 or MP700 media player can be attached. Before mounting, a site survey checks wall strength, cable routing and viewing height, and SmartRooms Qatar offers free site surveys. Power input is 100 to 240 V, so the supplied cord should be checked against your sockets during planning.

The display is managed with SuperSign W for content and SuperSign C for control and monitoring. If you own this model or need a current replacement with similar specifications, request a quote from SmartRooms Qatar and we will reply with a recommended equivalent.

Highlights

55-inch Full HD (1,920 x 1,080) panel with 300 nits typical brightness
USB content scheduling with no server connection required
Conformal coating against dust, iron powder and humidity
11.9 mm side bezels and a 38.6 mm depth
Operating range 0°C to 40°C, 10% to 80% humidity
Built-in power supply, 100 to 240 V, typical 80 W

Estimated timeline

Quotation within 1 working day · delivery timing depends on stock availability, and we confirm it with your quotation.

Specifications

25 specifications · Source: manufacturer · checked Oct 2026

PANEL3

Screen Size: 55"
Resolution: 1,920 x 1,080 (FHD)
Brightness(Module, Typ., cd/m²): 300

CONNECTIVITY3

Input: HDMI (2), Analog (RGB), Audio, USB
Output: External Speaker Out
External Control: RS232C (In/Out), RJ45, IR Receiver

PHYSICAL SPECIFICATION4

Bezel Width: 11.9mm (T/R/L), 18mm (B)
Monitor Dimension (W x H x D): 1,238 x 714.9 x 38.6 mm
Weight (Head): 17.1kg
VESA™ Standard Mount Interface: 300 x 300 mm

ENVIRONMENT CONDITIONS2

Operation Temperature: 0°C to 40°C
Operation Humidity: 10% to 80%

POWER2

Power Supply: 100-240 V~, 50/60 Hz
Power Type: Built-In Power

POWER CONSUMPTION2

Typ.: 80W
Smart Energy Saving: 55W

STANDARD(CERTIFICATION)3

Safety: UL/cUL/CB/TUV/KC
EMC: FCC Class "A"/CE/KC
ErP / Energy Star: Yes/Yes (Energy Star 7.0)

MEDIA PLAYER COMPATIBILITY2

OPS Type Compatible: No
External Media Player Attachable: Yes (MP500/MP700)

SOFTWARE COMPATIBILITY2

Content Management Software: SuperSign W
Control and Monitoring Software: SuperSign C

ACCESSORY2

Basic: Remote Controller (include battery 2ea), Power Cord, QSG, RGB Cable, Regulation Book, IR Receiver
Optional: Speaker (SP-5000), Stand (ST-492T), Media Player (MP500/MP700), Wall Bracket (LSW350B), VESA Adapter (AM-B330S), Wi-Fi Dongle (AN-WF500), Touch Overlay (KT-T550)

Downloads

5 files from the manufacturer

PDF Manuals & guides · Opens on manufacturer site ENG.pdf 1.9 MB PDF Manuals & guides · Opens on manufacturer site ENG.pdf 1.6 MB PDF Manuals & guides · Opens on manufacturer site MFL70265301_02_200421.pdf 4.4 MB URL Manuals & guides · Opens on manufacturer site Owner's Manual URL Software & firmware · Opens on manufacturer site Software & Drivers (support page)

Questions about 55SE3DD

Is the LG 55SE3DD still sold by LG?

No. LG has discontinued the 55SE3DD, so new units may not be available from the manufacturer. SmartRooms Qatar can quote a current equivalent or a compatible replacement that matches your screen size, connection needs and mounting plan. Send us the model and your site requirements, and we will reply with a quotation, usually within one working day.

What is the LG 55SE3DD best used for?

It is a 55-inch Full HD standard signage display with 300 nits typical brightness, designed for non-touch information and promotional content. It suits corridors, lobbies, waiting areas and meeting foyers indoors in schools, clinics, offices and hotels. Its 11.9 mm side bezels also help when several units are placed side by side.

Can I run content without a server?

Yes. Content can be played and scheduled from a USB connection, so no server connection is required. If a media player is disconnected, the display can show a preset image stored on USB instead of a no-signal image. This suits a school or clinic that updates its playlist on site each week.

Does it accept an OPS media player?

No. The manufacturer data lists the display as not compatible with OPS type media players. Instead, an external media player can be attached, specifically the MP500 or MP700. Specify your media player choice in the quote request so the cabling and mounting match your room layout.

Will it run on Qatar's 240 V mains supply?

The built-in power supply accepts 100 to 240 V at 50 or 60 Hz, which covers the 240 V, 50 Hz supply used in Qatar. Typical consumption is 80 W, falling to 55 W with Smart Energy Saving. Check that the supplied power cord fits your wall socket during the site survey before installation.

Can I place it in a sunny lobby or outdoor area in summer?

Not without precautions. The operating range is 0°C to 40°C with 10% to 80% humidity, while Qatar summer temperatures can exceed 45°C. Install it in an air-conditioned indoor space away from direct sunlight through glass. If you are unsure about a location, ask the SmartRooms Qatar team to check it during the site survey.

How much space and weight does it need?

The head measures 1,238 x 714.9 x 38.6 mm and weighs 17.1 kg, with a 300 x 300 mm VESA mounting pattern. Plan for a wall that can carry this weight and a bracket or stand that matches the pattern. The optional LSW350B wall bracket is available, and SmartRooms Qatar offers free site surveys before wall mounting.

Can it connect to Wi-Fi or a network?

Yes, in two ways. An optional Wi-Fi USB dongle, the AN-WF500, supports content distribution over Wi-Fi. Separately, SNMP support allows network management, and the RJ45 port, RS232C ports and IR receiver provide control options. Specify your network and control requirements in your quote request so the right accessories are included.

Can I tile several units into a video wall?

You can tile basic layouts, but the bezels are not uniform. The side and top bezels are 11.9 mm while the bottom bezel is 18 mm, so a tiled array will show a visible horizontal gap. For a tight, even wall, confirm your layout with the SmartRooms Qatar team before ordering.

Does it support portrait orientation?

Yes. The manufacturer data lists a portrait mode that allows the logo to be positioned as needed. This helps in narrow corridors, retail columns and building entrances where a vertical display fits best. Confirm orientation and mounting method during your site survey before the units are fixed in place.

What certifications does it carry?

The display lists UL, cUL, CB, TUV and KC safety marks, FCC Class A, CE and KC EMC approvals, and Energy Star 7.0. These details help procurement teams complete compliance checks for government and corporate tenders. If your tender requires specific certificate details, state that clearly in your quote request.

How do we order several units for a school or government office?

Send your quantities, installation locations and required accessories in one quote request. SmartRooms Qatar usually provides a quotation within one working day and works with purchase orders (LPOs) and government tenders, including Monaqasat. Payment can be made by bank transfer, cheque or purchase order. Basic accessories include a remote with batteries, power cord, RGB cable and quick start guide.