LG 55UM3F (Discontinued) · Replacements in Qatar

Name: LG 55UM3F 55-inch 350 nits UHD Digital Signage Display
Brand: LG
SKU: lg-55um3f
Availability: Discontinued

Overview

The LG 55UM3F is a discontinued 55-inch UHD signage display with an IPS panel at 3,840 x 2,160 resolution and 350 nits typical brightness. It runs 24 hours a day, works in portrait or landscape, and carries IP5x dust protection and a built-in speaker. LG has discontinued this model, so SmartRooms Qatar can quote a current equivalent or a compatible replacement for shops, lobbies and offices across Qatar.

What the LG 55UM3F is built for

The LG 55UM3F is a 55-inch UHD signage display from LG's UM3F series, designed for indoor environments where content must stay sharp, run continuously and be easy to manage. It suits menu boards, wayfinding screens, lobby information displays and corridor advertising. LG has discontinued this model, so this page is written for organisations that already own units, buyers comparing it with newer displays and anyone looking for a replacement.

Panel and picture facts that matter

The native resolution is 3,840 x 2,160, four times the pixels of Full HD, on a 16:9 IPS panel. The typical brightness is 350 nits with a 1,100:1 contrast ratio, and the 178 x 178 viewing angle keeps the picture readable for people standing to the side. The manufacturer rates the panel life at 50,000 hours of typical use.

Resolution: 3,840 x 2,160 on an IPS panel
Brightness: 350 nits typical with 1,100:1 contrast
Video decoding: HEVC support, which the manufacturer says halves network traffic compared with H.264
Bezel: 9.9 mm on the sides and 14.4 mm at the bottom

Mounting, power and environment planning

The panel measures 1,234.4 mm wide, 720.9 mm high and 39.9 mm deep. It weighs 19.0 kg without packaging and 24.2 kg packed, and it has a 300 x 300 VESA mounting interface. The manufacturer lists a maximum tilt of 30 degrees, a rating that applies within 30°C and 50 percent humidity. Power is 100-240V at 50/60Hz from a built-in supply, drawing a typical 95W and a maximum 140W. The operating range is 0°C to 40°C with 10 to 80 percent humidity, so in Qatar's summer months the display should sit in an air-conditioned space. Confirm the room conditions with the SmartRooms Qatar team before choosing a location.

Where the 55UM3F fits across Qatar

A shopping mall in Msheireb or West Bay fitting a portrait directory screen beside a lift lobby, using the automatic orientation setting at first power-up.
A private school in Al Wakrah or Lusail mounting screens in corridors and reception to show timetables and announcements, with narrow side bezels keeping the wall tidy.
A hotel or serviced apartment building in The Pearl running a 24-hour welcome message, where the 70W energy-saving figure helps manage consumption during quiet periods.

Choosing a replacement for a discontinued model

Because LG has discontinued the 55UM3F, buyers who need matching screens for an expansion should plan carefully. SmartRooms Qatar can quote a current equivalent or a compatible replacement, and a free site survey checks mounting points, power and room conditions before anything is ordered. Quotations are usually issued within one working day, and we accept purchase orders (LPOs) and government tenders. Tell us the number of screens, the room and the content software you use, and request a quote today.

Highlights

3,840 x 2,160 UHD resolution on a 16:9 IPS panel
350 nits typical brightness and 1,100:1 contrast ratio
Portrait and landscape orientation with automatic detection at setup
IP5x dust protection and a built-in speaker
Three HDMI inputs plus DisplayPort, DVI-D and USB 2.0
OPS-compatible, with Crestron Connected and Cisco compatibility certified

Estimated timeline

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

Specifications

40 specifications · Source: manufacturer · checked Oct 2026

PANEL12

Screen Size: 55"
Panel Technology: IPS
Aspect Ratio: 16 : 9
Native Resolution: 3,840 x 2,160 (UHD, RGB)
Brightness(Typ.,cd/m²): 350
Contrast Ratio: 1,100:1
Viewing Angle (H x V): 178 x 178
Response Time: 8ms (G to G)
Surface Treatment (Haze): Haze 3%
Life Time (Typ.): 50,000 Hrs
Operation Hours: 24 Hrs
Orientation: Portrait & Landscape

CONNECTIVITY3

Input: HDMI (3), DP, DVI-D, Audio, USB 2.0
Output: DP, Audio (Off/Fixed/Variable)
External Control: RS232C In/out, RJ45 (LAN) In, IR In

MECHANICAL SPECIFICATION8

Bezel Color: Black
Bezel Width: 9.9mm(T/R/L), 14.4mm(B)
Monitor Dimension (W × H × D): 1,234.4mm x 720.9mm x 39.9mm
Weight (Head): 19.0 kg
Carton Dimensions (W × H × D): 1,360mm x 835mm x 175mm
Packed Weight: 24.2 kg
Handle: No
VESA™ Standard Mount Interface: 300 x 300

SPECIAL FEATURE2

Tilt (Facedown): Max. 30º *In conditions within 30ºC temperature, 50% humidity
IP Rating: IP5x

ENVIRONMENT CONDITIONS2

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

POWER2

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

POWER CONSUMPTION2

Typ. / Max.: 95W / 140W
Smart Energy Saving: 70W

CERTIFICATION3

Safety: CB / NRTL
EMC: FCC Class "A" / CE / KC
ErP / Energy Star: Yes(EU Only) / Yes (Energy Star 8.0)

MEDIA PLAYER COMPATIBILITY1

OPS Type Compatible: Yes

SOFTWARE COMPATIBILITY3

Content Management Software: SuperSign CMS
Control and Monitoring Software: SuperSign Control/Control+
Signage365Care: Yes

ACCESSORY2

Basic: Remote Controller, Power Cord, QSG, HDMI Cable, Regulation Book, Phone to RS232C Gender
Optional: Stand(ST-653T), Media Player, Wall Bracket(LSW350B), VESA Adapter(AM-B330S), OPS Kit(KT-OPSF)

Downloads

4 files from the manufacturer

PDF Manuals & guides OM_ARA.pdf 3.7 MB PDF Manuals & guides webOS4.1_ENG.pdf 6.8 MB URL Manuals & guides · Opens on manufacturer site User Guide URL Software & firmware · Opens on manufacturer site Software & Drivers (support page)

Questions about 55UM3F

Is the LG 55UM3F still available from LG?

No. LG has discontinued the 55UM3F, so it is no longer in the current range. If you need this size for a lobby, corridor or menu board, SmartRooms Qatar can quote a current equivalent or a compatible replacement. Share the room layout, the number of screens and the content software you use, and the quotation is usually issued within one working day.

What is the LG 55UM3F designed for?

It is a 55-inch UHD signage display for indoor spaces such as shopping malls, hotel lobbies, school corridors and office receptions. The 3,840 x 2,160 IPS panel keeps text and images sharp at close viewing distances, and the 178 x 178 viewing angle lets people approach the screen from the side and still read it clearly.

Can it show a portrait menu or directory screen?

Yes. The panel supports portrait and landscape orientation and detects its orientation automatically during first setup, so the on-screen menu and background content are set the right way up without manual rotation. A mall in West Bay can use the same unit as a portrait directory beside a lift or in landscape along a main walkway.

Do I need a separate media player?

Not always. The UM3F series has a built-in quad core processor that plays content without an external media player, and the LG webOS platform runs the display. It is also OPS-compatible, so you can add an OPS media player if your content or software needs one. The optional OPS Kit (KT-OPSF) and a media player are listed as accessories.

Which inputs and control ports does it have?

The display has three HDMI inputs, one DisplayPort input, one DVI-D input, an audio input and a USB 2.0 port. It also has a DisplayPort output, an audio output, RS232C in and out, an RJ45 LAN port and an IR input. The basic accessories include a remote controller, power cord, quick start guide, HDMI cable and a phone-to-RS232C gender adapter.

Can we monitor it remotely?

Yes. The UM3F series can send email notifications when a problem occurs, such as the unit being tilted by an external impact, so facilities teams can act right away. The RJ45 LAN port and RS232C control support network management. The source lists compatibility with SuperSign CMS, SuperSign Control and Control+, and Signage365Care, so ask our team which tool suits your estate.

Does it work with AV control systems and video conferencing?

It is certified as Crestron Connected for integration with professional AV control systems and automated control. It is also certified for compatibility with Cisco systems, so a boardroom or university conference room can change input and picture settings when a call arrives. Ask SmartRooms Qatar to confirm your exact Crestron or Cisco setup before ordering.

Will it cope with Qatar summers?

The operating range is 0°C to 40°C with 10 to 80 percent humidity, and the manufacturer designs it for indoor environments. Temperatures in Doha can exceed 45°C in summer, so the display should sit in an air-conditioned lobby, corridor or office, away from windows that receive direct sunlight. Our team can review the location during a free site survey.

How much wall space and support does it need?

The panel measures 1,234.4 mm by 720.9 mm and is 39.9 mm deep, with a 300 x 300 VESA mounting interface. It weighs 19.0 kg without packaging and 24.2 kg packed, so a school corridor or reception wall needs a bracket rated for that load and fixings suited to the wall type. The wall bracket LSW350B is listed as optional, and a free site survey confirms wall type, height and cable route.

How far can the screen be tilted?

The manufacturer lists a maximum tilt of 30 degrees downward, which helps when a display is mounted above eye level and angled for comfortable viewing. This rating applies within 30°C and 50 percent humidity, so check the room conditions before setting the angle. The built-in horizontal sensor helps installers level the screen accurately.

What is the power draw for a 24-hour hotel lobby?

The typical draw is 95W and the maximum is 140W, with 70W listed for smart energy saving. The display is rated for 24-hour operation and uses a built-in power supply rated 100-240V at 50/60Hz, a range that includes Qatar's 240V, 50Hz mains. A hotel in The Pearl or Lusail should plan circuits around the maximum figure and use the energy-saving setting during quieter hours.

Can it be used in a bank or clinic waiting area?

Yes, in air-conditioned indoor waiting areas. A bank branch in Doha or a clinic in Al Sadd can use it to show queue numbers, service information and promotional loops. The IP5x dust protection suits busy entrance areas, provided the screen sits inside the building away from direct sunlight and within the 0°C to 40°C operating range.