LG 55SE3KB (Discontinued) · Replacements in Qatar

Name: LG 55SE3KB 55-inch Full HD Standard Signage Display
Brand: LG
SKU: lg-55se3kb
Availability: Discontinued

Overview

The LG 55SE3KB is a 55-inch Full HD signage display rated at 350 cd/m² that works in portrait or landscape. It plays content through a SuperSign player over the network or from a USB drive without a server, and its circuit board has a conformal coating against dust and humidity. LG has discontinued this model, so it suits Qatar organisations that already run it or need a current equivalent.

A 55-inch Full HD display for portrait or landscape signage

The LG 55SE3KB is a 55-inch signage display with a 1,920 x 1,080 Full HD panel and 350 cd/m² brightness. It can be mounted in portrait or landscape orientation, so one model can run a vertical menu board, a wayfinding screen or a horizontal information panel. LG has discontinued this model, and this page is written for organisations that already operate it, buyers comparing it with newer displays, and anyone looking for a current equivalent.

Connectivity, network control and USB scheduling

The panel has one HDMI input, one DVI input, one analog RGB input, one audio input, two USB ports, an RJ45 network port, RS232C input and output, and an IR receiver. There is no DisplayPort input. An embedded SuperSign player handles content transfer and control over the network. Where a network connection is not practical, content can be played and scheduled from a USB connection without a separate content server.

Software: compatible with SuperSign-w lite and SuperSign-c
Media players: no OPS slot; an external MP500 or MP700 media player can be attached

Size, bezels and mounting

The monitor measures 1,238 mm wide, 714.9 mm high and 54 mm deep, with the thinnest section at 38.6 mm, and the head weighs 17.5 kg. The bezel is 11.9 mm on the top, left and right and 18 mm at the bottom, which shows when panels are tiled. The VESA interface is 300 mm x 300 mm. Optional accessories listed for this model include the ST-492T stand, the LSW350B wall bracket and the AM-B330S VESA adapter.

The source data for this model does not give an operating temperature range. Before placing it near windows, in an entrance exposed to dust, or in any space that is not air-conditioned, confirm the environment with the SmartRooms Qatar team. The conformal coating on the circuit board protects against dust and humidity, but it does not replace a site check in summer, when temperatures in Doha can exceed 45°C.

Where it fits in Qatar

A private school in Al Wakrah fitting out a corridor could mount a landscape panel to show timetables and event notices, with staff updating the schedule from a USB drive. A clinic in Msheireb could use a portrait panel in its waiting area for queue numbers and directions, controlled over the network from reception. A retail unit in a West Bay mall could run promotional content over the network from head office.

What to confirm before you request a quote

Orientation: portrait or landscape, and the type of content shown
Control: network management through SuperSign, or USB scheduling
Mounting: wall bracket, stand or VESA adapter, and the wall's load capacity
Quantity: one display or several panels for a school, office or venue

Because this model is discontinued, request a quote for a current equivalent or a compatible replacement. Include the number of units, the location and the mounting type. SmartRooms Qatar supports purchase orders (LPOs) and government tenders, including Monaqasat, and quotations are usually issued within one working day. Request a quote and the team will confirm the options for your site.

Highlights

55-inch Full HD panel with 1,920 x 1,080 resolution
350 cd/m² brightness
Portrait and landscape orientation
Network control via RJ45 and RS232C
USB content scheduling without a content server
Conformal coating on the circuit board against dust and humidity

Estimated timeline

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

Specifications

27 specifications · Source: manufacturer · checked Oct 2026

PANEL3

Screen Size: 55"
Resolution: 1,920 x 1,080 (FHD)
Brightness: 350cd/m²

CONNECTIVITY - INTPUT10

HDMI: Yes (1)
DP: No
DVI: Yes (1)
Analog (RGB): Yes (1)
Audio: Yes (1)
External Control (RS232C IN): Yes (1)
External Control (RJ45): Yes (1)
External Control (IR receiver): Yes (1)
External Control (Pixel Sensor): No
USB: Yes (2)

CONNECTIVITY - OUTPUT3

Audio Out: Yes
Externel Speaker Out: No
External Control (RS232C OUT): Yes (1)

PHYSICAL SPECIFICATION4

Bezel Width: 11.9mm (T/R/L), 18mm (B)
Monitor Dimension (W x H x D): 1,238mm X 714.9mm X 54mm (38.6mm : Thinnest Part)
Weight (Head): 17.5kg
VESA™ Standard Mount Interface: 300mm x 300mm

MEDIA PLAYER COMPATIBILITY2

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

SOFTWARE COMPATIBILITY2

SuperSign-w lite: Yes
SuperSign-c: Yes

ACCESSORY2

Basic: Remote Controller (include battery 2ea), Power Cord, QSG, RGB Cable, Regulation Book, Phone to RS232C Gender, Memory cover
Optional: Stand (ST-492T), Media player, Wall bracket (LSW350B), VESA Adapter (AM-B330S)

GENERAL1

Region: Global

Downloads

5 files from the manufacturer

PDF Manuals & guides · Opens on manufacturer site ENG.pdf 8.8 MB PDF Manuals & guides · Opens on manufacturer site ENG.pdf 1.9 MB PDF Manuals & guides · Opens on manufacturer site MBM65237604_04_SCA.pdf 2.7 MB URL Manuals & guides · Opens on manufacturer site Owner's Manual URL Software & firmware · Opens on manufacturer site Software & Drivers (support page)

Questions about 55SE3KB

Is the LG 55SE3KB still sold new by LG?

LG has discontinued the 55SE3KB, so it is no longer part of the manufacturer's current range. If your project needs a 55-inch Full HD signage display with similar features, SmartRooms Qatar can quote for a current equivalent or a compatible replacement. Send the number of units, your wall or stand details and whether you need network control, and the team will recommend the closest option for your site.

Can I buy a matching spare for an existing 55SE3KB installation?

Rather than assuming a like-for-like spare is available, ask for a quotation. Tell SmartRooms Qatar how many displays you already have, including the model variant 55SE3KB-B, and the team can check a replacement against your mounting pattern and content setup. The VESA interface is 300 mm x 300 mm, so the mounting and the current content system both need to be confirmed before you approve the quotation.

Does the display work in portrait orientation for a vertical menu board?

Yes. The manufacturer data lists both portrait and landscape modes, so the 55SE3KB can be used as a vertical menu board in a café or hotel restaurant in West Bay, or as a tall wayfinding panel in a lobby. Choose the orientation to suit your content, and confirm the bracket and cable route before installation. If you need several portrait panels in one room, ask for a quote covering the full set.

How do staff update content if there is no content server?

The 55SE3KB supports USB content scheduling, so content can be played and scheduled from a USB connection without a server, and it has two USB ports. For a private school in Al Wakrah, this means a teacher can update notices between lessons from a USB drive. Sites connected to a network can instead be managed through the embedded SuperSign player and the RJ45 port.

Which software is compatible with the LG 55SE3KB?

The manufacturer data lists compatibility with SuperSign-w lite and SuperSign-c. The embedded SuperSign player transfers content and provides control over the RJ45 network interface, and RS232C offers a serial control option. For a government office in Doha running one playlist across several floors, confirm which software setup fits the existing network before ordering, so that the displays and content system work together from day one.

Does it have an OPS slot or need an external media player?

It has no OPS slot. The 55SE3KB can take an external media player, and the listed options are the MP500 and MP700. This matters for hospitals and hotels that prefer to keep the player away from the screen, which helps keep cables tidy behind a wall-mounted panel. Add the media player to your quotation request if you want it supplied with the displays.

What inputs are available for connecting laptops and media players?

The panel offers one HDMI input, one DVI input, one analog RGB input and one audio input. It does not have a DisplayPort input, so laptops that output only through DisplayPort will need an adapter or a different source. Two USB ports are available for USB content. Check the output ports on your laptop or player before ordering so the connection matches the room layout.

How heavy is the display and what wall does it need?

The head weighs 17.5 kg and uses a 300 mm x 300 mm VESA interface. Before wall mounting, confirm the wall can carry this load and that the fixing points match the bracket. For a reception area in a new building at Lusail, SmartRooms Qatar offers a free site survey to check the wall, fixings and cable routes before installation day.

What are the physical dimensions and bezel widths?

The monitor measures 1,238 mm x 714.9 mm x 54 mm, with the thinnest part at 38.6 mm. Bezels are 11.9 mm on the top, left and right and 18 mm at the bottom. In a video wall in a shopping mall in West Bay, the wider bottom bezel will show as a horizontal gap, so compare it with the bezels of newer models before settling on a layout.

Can it be installed near a window or outdoors in Doha summers?

The source data for the 55SE3KB does not state an operating temperature range, so outdoor or high-heat use should not be assumed. Summer temperatures in Doha can exceed 45°C, and dust storms are common. The conformal coating protects the circuit board against dust and humidity, but confirm the installation environment with the SmartRooms Qatar team before placing the panel near glass, in an open entrance or outdoors.

Would it suit a training centre in Education City?

A 55-inch Full HD panel at 350 cd/m² suits training rooms with controlled lighting better than a bright atrium. Trainers can show slides or a daily schedule in portrait or landscape. SuperSign network scheduling suits a centre running several rooms, while USB scheduling is enough for a single room. Request a quote with room sizes and lighting levels so the unit count and layout can be confirmed.

Can we buy it through an LPO or a government tender?

Yes. SmartRooms Qatar accepts purchase orders (LPOs) and government tenders, including Monaqasat, and payment can be made by bank transfer, cheque or purchase order. For a school or ministry ordering several units, send the quantity, delivery location and mounting requirements with the LPO reference. Quotations are usually issued within one working day, and products are covered by the manufacturer's warranty.