LG 75UM3DG-H (Discontinued) · Replacements in Qatar

Name: LG 75UM3DG-H 75-inch UHD Large Screen Signage Display
Brand: LG
SKU: lg-75um3dg-h
Availability: Discontinued

Overview

The LG 75UM3DG-H is a 75-inch UHD signage display that LG has discontinued. It offers 3,840 x 2,160 resolution on an IPS panel, a built-in speaker, webOS for standalone playback and LAN-based remote monitoring. It suits lobbies, corridors and meeting rooms in Doha that need a large screen running indoors for long hours. Organisations that already own this model, or need a comparable replacement, can request a quote from SmartRooms Qatar.

What this discontinued 75-inch display offers

The LG 75UM3DG-H is a 75-inch UHD large screen signage display from the UM3D series. LG has discontinued this model, so this page serves organisations that already run it, buyers comparing it with newer displays, and anyone looking for a replacement. SmartRooms Qatar can quote a current equivalent or a compatible replacement for the same job.

Picture quality and viewing facts

The IPS panel has a native resolution of 3,840 x 2,160, four times the pixel count of Full HD, so menu boards, floor plans and small print stay sharp at close range. Typical brightness is 350 nits, with a native contrast ratio of 1,100:1, and the manufacturer also lists a dynamic contrast figure of 1,000,000:1. The 178 x 178 degree viewing angle keeps content readable from the side of a corridor or seating area.

A 28% haze surface treatment reduces glare from overhead lighting. Colour coverage is BT.709 95% with 10-bit colour depth, and response time is 6 ms grey to grey. The screen can run in portrait or landscape, which suits vertical wayfinding panels and queue displays.

Connectivity and software for managed content

Inputs: three HDMI ports with HDCP 2.2/1.4, RJ45 LAN, RS232C in, IR in and a USB 2.0 Type A port.
Outputs: audio out and RS232C out.
Software: webOS signage platform with SuperSign CMS, SuperSign Control and Control+, SuperSign WB, SuperSign Media Editor and LG ConnectedCare.

Control Manager provides web-based monitoring, so facilities teams can check the status of displays at several sites from internet-connected devices. The USB port supports external sensors such as temperature or NFC/RFID readers through a plug-in connection. Crestron Connected and Cisco compatibility support AV control and video conferencing in meeting rooms, and the built-in speaker covers announcements in small spaces without extra speakers.

Where it fits in Qatar

In a lobby in West Bay or Lusail, a display of this size can show visitor directions, building notices and bilingual welcome messages during opening hours. The panel is rated for 24/7 operation, so it suits hospital waiting areas in Al Sadd or mall concourses where information loops must run continuously.

A school or training centre in Education City or Al Rayyan can use it in a corridor or meeting room that also hosts video calls with partners abroad, with one screen serving both presentations and calls.

What to plan before you order

Operating conditions are 0 to 40 °C and 10% to 80% humidity. Qatar summers can exceed 45 °C, so install in air-conditioned indoor areas, away from direct sun, dust and outdoor exposure.
The head weighs 41.5 kg and uses a 600 x 400 VESA pattern. Check the wall or stand structure with a site survey before mounting.
Dimensions are 1682.4 x 960.3 x 57.9 mm without handle and logo. Allow room for cable routing and ventilation.
Power is AC 100-240 V, 50/60 Hz with a built-in supply. Typical draw is listed at 180 W and maximum at 260 W. Confirm the power cord for BS 1363 sockets with our team.

The box includes a remote controller, power cord, quick start guide, regulation book and a phone-to-RS232C adapter. The optional LSW640A/B wall mount and KT-T75E touch overlay can be added to your quotation. Certifications listed include CB/NRTL, FCC Class A, CE, KC and Energy Star 8.0.

Request a quote from SmartRooms Qatar for this model or a current equivalent. We will confirm mounting, connectivity and software needs for your site, and quotations are usually provided within one working day.

Highlights

75-inch IPS panel at 3,840 x 2,160 native resolution
Typical brightness of 350 nits with 28% haze finish
Rated for 24/7 operation with webOS platform
Three HDMI inputs supporting HDCP 2.2 and 1.4
Built-in speaker and wireless access point function
Crestron Connected and Cisco compatibility; model discontinued

Estimated timeline

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

Specifications

39 specifications · Source: manufacturer · checked Oct 2026

PANEL13

Screen Size: 75
Panel Technology: IPS
Native Resolution: 3,840 x 2,160 (UHD, RGB)
Brightness: 350nit (Typ.)
Contrast Ratio: 1,100:1
Dynamic CR: 1,000,000:1
Color Gamut: BT709 95%
Viewing Angle(H x V): 178 x 178
Color Depth: 10bib, 1.07Billion colors
Response Time: 6ms (G to G)
Surface Treatment(Haze): Haze 28%
Operation Hours (Hours/Day): 24/7
Portrait / Landscape: Yes / Yes

CONNECTIVITY2

Input: HDMI (3, HDCP2.2/1.4), RS232C IN (1, 4pin Phone-jack), RJ45(LAN), IR IN, USB2.0 Type A
Output: Audio Out, RS232C OUT (1, 4pin Phone-jack)

MECHANICAL SPECIFICATION6

Bezel Color: Black
Bezel Width: Even bezel : 14.9mm
Weight (Head): 41.5 kg
Monitor Dimension(W x H x D): 1682.4 x 960.3 x 57.9mm (without Handle and LG Logo)
Handle: Yes
VESA™ Standard Mount Interface: 600 x 400

ENVIRONMENT CONDITIONS2

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

POWER2

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

POWER CONSUMPTION3

Typ.: 180W (TBD)
Max.: 260W (TBD)
BTU (British Thermal Unit): 614.25 BTU/Hr(Typ.), 887.25 BTU/Hr(Max) (TBD)

SOUND1

Speaker: Yes

CERTIFICATION3

Safety: CB / NRTL
EMC: FCC Class “A” / CE / KC
ErP / Energy Star: Yes / Energy Star 8.0

SOFTWARE COMPATIBILITY5

SuperSign CMS: Yes
SuperSign Control / Control+: Yes
SuperSign WB: Yes
SuperSign Media Editor: Yes
LG ConnectedCare: Yes

ACCESSORY2

Basic: Remote Controller., Power Cord, QSG, Regulation Book, Phone to RS232C Gender
Optional: LSW640A/B(Wall Mount),Touch overlay(KT-T75E)

Downloads

4 files from the manufacturer

PDF Manuals & guides · Opens on manufacturer site MFL71454531_00_210114.pdf 5.3 MB PDF Manuals & guides · Opens on manufacturer site OM_ENG.pdf 6.4 MB URL Manuals & guides · Opens on manufacturer site Owner's Manual (global) PDF Manuals & guides · Opens on manufacturer site webOS4.1_ENG.pdf 6.8 MB

Questions about 75UM3DG-H

Is the LG 75UM3DG-H still sold by LG?

No. LG has discontinued the 75UM3DG-H, so this page is for organisations that already own one and for buyers looking for a replacement. SmartRooms Qatar can quote a current equivalent or a compatible replacement. To get the closest match, send the room use, the number of units and any media player or video conference system you need to connect.

Can it replace a 75-inch screen in a Doha office without changing the wall bracket?

It depends on the existing bracket. The mount uses a 600 x 400 VESA pattern and the head weighs 41.5 kg, so the bracket must match that pattern and carry the load. Measure the old panel's mounting holes and dimensions before ordering, and book a free site survey so the team can check the wall structure in your Doha office.

What resolution and viewing angle does it offer for menus or floor plans?

The native resolution is 3,840 x 2,160, four times Full HD, so small text on menus, floor plans and timetables stays sharp at close range. The IPS panel has a 178 x 178 degree viewing angle, so staff standing at an angle or visitors in a waiting area can still read the content clearly.

Will it cope with Qatar's summer heat or sunlight through a window?

Its listed operating temperature is 0 to 40 °C with 10% to 80% humidity. Qatar summers can exceed 45 °C, so place it in an air-conditioned interior, away from direct sun and dust, rather than a sun-facing lobby window or an outdoor kiosk. The 28% haze finish reduces reflections, but it does not replace controlled room conditions.

Can it run all day in a hospital waiting area or a mall concourse?

The manufacturer lists 24/7 operation, so it can run looping health information or wayfinding content through long opening hours. In a clinic or hospital waiting area in Al Sadd, or a mall concourse in West Bay, keep the room ventilated and confirm the expected ambient temperature with the SmartRooms Qatar team before installation.

How do I manage content and monitor several screens across sites?

The display supports SuperSign CMS, SuperSign Control and Control+, SuperSign WB and SuperSign Media Editor. Control Manager adds web monitoring so a facilities team can check status from internet-connected devices. For remote fault diagnosis across branches, LG ConnectedCare is listed as compatible with this model and is an optional cloud service.

Which inputs and outputs does it have for a laptop, media player or conference codec?

It has three HDMI inputs with HDCP 2.2/1.4, an RJ45 LAN port, RS232C in, IR in and a USB 2.0 Type A port. Audio out and RS232C out are provided. If a source only has USB-C or another connection, confirm the adapter with the team before ordering, because the data does not list one.

Does it work with Crestron or Cisco control in a boardroom?

The data lists Crestron Connected support for AV and automated control, and compatibility with a Cisco system for video conference control. For a boardroom in Msheireb or West Bay that calls teams abroad, ask your integrator to confirm the exact model and software version of your controller and conferencing system before the quotation is finalised.

Does it need external speakers for announcements?

No external speakers are needed for basic audio, because it has a built-in speaker. This suits a small training room, a reception area or corridor announcements. For a large lecture hall or event venue, plan a separate audio system instead.

What power supply does it need and how much does it draw?

It accepts AC 100-240 V at 50/60 Hz with a built-in power supply, so Qatar's 240 V mains falls within its listed range. Typical consumption is listed at 180 W and maximum at 260 W. The power cord is included; confirm it suits BS 1363 Type G sockets with the SmartRooms Qatar team before installation.

What comes in the box and which options can I add?

The box includes a remote controller, power cord, quick start guide, regulation book and a phone-to-RS232C adapter. The optional LSW640A/B wall mount and KT-T75E touch overlay can be included in your quotation. Tell us if you need a touch overlay, since it is a separate optional item.

Can we order through an LPO or a government tender?

Yes. SmartRooms Qatar supplies government ministries and public schools on purchase orders (LPOs) and through government tenders, including Monaqasat. Payment can be by bank transfer, cheque or purchase order. Request a quote with your tender reference, quantity and site location, and we will arrange a free site survey before any 41.5 kg panel is mounted.