View 24U421A Gallery in high resolution

$139

Available on Amazon Updated Aug 30, 2026

Overall46.0

Work44.5

Play61.0

Refresh61.0

Response60.0

Color78.0

Quality / price66.2

$139 on Amazon Add this monitor to a build Compare this monitor Monitor table

Written analysis

24U421A at a glance

The 24U421A is a 23.8" VA monitor at 1920×1080 and 100 Hz. The listed aspect ratio is 1.778:1, 16:9. The backlight is listed as W-LED.

Best fit: straightforward office, media, or secondary-display use after checking resolution and refresh against the rest of the system.

Panel and image

Overall quality is 46.0, with 44.5 work and 61.0 play. Pixel density is listed at 92 PPI. Typical brightness is 250 nits. Contrast is listed as 3000:1. The coating is Anti-glare/Matte (3H). The listed pixel count is treated as a 1080p-class work multiplier.

Color and HDR

Recorded gamut coverage is 99% sRGB. Color depth is listed as 8-bit. HDR is listed as HDR10.

Motion and sync

Refresh is listed at 100 Hz. Response time is listed as 5.00 ms. Pair this resolution with the GPU table before assuming native high settings.

Ergonomics and connectivity

Stand and mount options are listed as Tilt · VESA (100x100mm). Recorded inputs include 1 x USB 3.0 (Type-C; 15W), 1 x HDMI 2.0, 1 x 3.5 mm Audio Out.

Buying verdict

Overall quality is 46.0. Treat it as a practical screen and compare nearby monitors if color, refresh, or ergonomics matter more.

At the recorded Amazon price, quality / price is 66.2—an excellent value relative to nearby monitors.

Work / price is 64.0 and play / price is 61.4.

Display data

Full specifications

Panel, color, motion, connectivity, ergonomics, power, and value in one sheet.

General

Manufacturer: LG
Monitor: 24U421A
Launch price: —
Amazon price: $139
Amazon availability: Available
Price updated: Aug 30, 2026
Launch date: Jan 1, 2025

Panel

Size: 23.8"
Panel type: VA
Resolution: 1920×1080
Aspect ratio: 1.778:1, 16:9
Pixel density: 92 PPI
Brightness: 250 nits
Contrast: 3000:1
Display area: 90.36 in²
Viewing angles: 178 ° (degrees) / 178 ° (degrees)
Backlight: W-LED
Coating: Anti-glare/Matte (3H)

Color & HDR

Color depth: 8-bit
Colors: 16777216
DCI-P3: —
sRGB: 99.00%
Adobe RGB: —
NTSC: —
HDR: HDR10
Local dimming: No

Motion

Refresh rate: 100 Hz
Response time: 5.00 ms
Input lag: —
Adaptive sync: —

Connectivity

Inputs: 1 x USB 3.0 (Type-C; 15W), 1 x HDMI 2.0, 1 x 3.5 mm Audio Out
Speakers: —

Ergonomics

Height adjustment: No
Pivot: No
Swivel: No
Tilt: Yes
VESA mount: Yes · 100x100mm

Power & value

Typical power: —
Max power: —
Overall: 46.0
Work: 44.5
Play: 61.0
Quality / price: 66.2
Work / price: 64.0
Play / price: 61.4

Additional information

Features: 3-Side Virtually Borderless Design, Adaptive-Sync technology, Black Stabilizer, Color Weakness, Dynamic Action Sync, Flicker-free technology, HDR Effect, LG Switch, Low Blue Light, Reader Mode, Smart Energy Saving, Super Resolution+
Accessories: HDMI cable
Amazon warranty: 1 Year Manufacturer
Amazon dimensions: {'width': 21.11, 'height': 16.22, 'length': 6.69, 'weight': 6.44}

Extracted notes sit here. Amazon listing copy, when present, is at the bottom of the page.

Amazon

Price history

Nearby quality

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LG 24U421A This monitor

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Vendor copy

Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

Vivid Color with Full HD Resolution - The 1920x1080 Full HD resolution on the 23.8" delivers clear visuals and vibrant color on a curved screen designed to keep more of your work in view. Tackle tasks, browse, or stream with clarity that helps you stay focused and efficient.

100Hz Smoother, Seamless Visuals - With a 100Hz refresh rate and 5ms (GtG) response time, motion stays smooth and clear—whether you're scrolling, streaming, or switching between tasks.

Multiple Devices-One Cable - Easily connect to laptops, desktops, or devices with USB Type-C and HDMI. USB-C delivers up to 15W power —all through a single, streamlined cable.

Easy Viewing, Comfortable Reading - Reader Mode lowers blue light levels, creating a more comfortable viewing experience—great for reading documents, browsing the web, or working for extended periods.

Action As It Happens - Dynamic Action Sync minimizes input lag for faster reactions—so you can respond to every move, shot, or turn the instant it happens.

Never In The Dark - Brighten up dark scenes and spot enemies faster with Black Stabilizer. It enhances visibility in shadowy areas—giving you the upper hand when the action gets intense.

Customize Your Screen View with the Switch App - The Switch app transforms your screen into a multitasking hub for work, gaming, and streaming. Effortlessly split the screen into up to 6 sections, customize display layouts, or launch video calls with a single hotkey. Navigate smart features with ease and switch seamlessly between your PC and the built-in webOS streaming platform, all with intuitive shortcuts.

Sleek Stand, Maximum Desktop Efficiency - Free up your desk with the ultra-slim stand—built to minimize clutter and maximize usable space. Enjoy a cleaner, more organized setup without sacrificing screen size or comfort.

Virtually Borderless Design - This LG monitor features a 3-side narrow-bezel design, giving you more screen space with fewer distractions—perfect for focusing on work, enjoying entertainment, or creating a cleaner, modern setup.

What's In The Box - 1. Stand Body 2. Stand Base 3. Screws 4. Power Adapter 5. Power Cord 6. HDMI Cable 7. Quick setup guide