LG PK340S 55"
Built for commercial environments, this 55-inch display features a direct-lit LED LCD panel with a 3840 x 2160 native resolution and integrated LAN and RS-232 control for centralized management. Its webOS platform supports HDR10 and HLG formats while enabling embedded content playback and group management for digital signage. This unit is best for retail and hospitality businesses needing a reliable, remotely controllable display for 16/7 operation, not for home theater or gaming.
Snapshot
The 30-Second Version
A dim, frustrating commercial display that's outclassed by any modern budget TV. Buy it only if you need RS-232 control and have already given up on picture quality.
Pros & Cons
Pros
- Built for 16/7 operation, so it can run all day without breaking a sweat 68th
- LAN and RS-232 control is a must for commercial installs
- webOS is a familiar, if basic, smart platform
- USB playback is handy for simple signage loops
Cons
- A dim, washed-out picture that's dead last in our user sentiment rankings
- No power scheduling, which is a baffling omission for a commercial display
- Management software is reportedly unresponsive and frustrating
- Can't be mounted vertically, limiting its signage use cases
What owners think
The Word on the Street
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
The proof
Performance
The picture quality is a real letdown. We're talking 300 nits of brightness and a 1200:1 contrast ratio, which lands it in the bottom third of our database. HDR is technically supported, but with those specs, it's just a checkbox feature. You won't see any meaningful pop or depth. The 60Hz panel and 8ms response time are fine for a lobby slideshow, but our gaming score of 41 out of 100 tells you everything you need to know about playing anything more demanding than Solitaire on it.
Specifications
Full Specifications
Display
| Size | 55" |
| Resolution | 4K |
| Panel Type | LED |
| Aspect Ratio | 16:9 |
Picture Quality
| Brightness | 300 nits |
| Contrast Ratio | 1200:1 |
HDR
| HDR Formats | HDR10, HLG |
| Dolby Vision | No |
| HDR10+ | No |
| HLG | Yes |
Gaming
| Refresh Rate | 60 Hz |
| Response Time | 8 |
Smart TV
| Platform | webOS |
Audio
| Wattage | 20 |
| Dolby Atmos | No |
Connectivity
| HDMI Ports | 2 |
| HDMI Version | 2.01 |
| USB Ports | 1 |
| Ethernet | Yes |
| Optical Audio | Yes |
| VESA Mount | 200x300 |
Power & Size
| Weight | 10.2 kg / 22.5 lbs |
vs Competition
Stacked against a real home theater display like the Sony BRAVIA XR A95L, the LG looks like a relic from a decade ago. The Sony's QD-OLED panel is in a different universe for picture quality. Even a mid-range consumer TV like the Roku Pro Series 55R8C5 will run circles around the PK340S with better brightness, smarter software, and actual HDR performance. The only reason to pick the LG is if you absolutely need RS-232 control and a 16/7 duty cycle, and you don't care about the image.
| Spec | LG PK340S 55" | Sony BRAVIA XR XR77A95L | TCL QM7K Series 98QM7K | Samsung Neo QLED QN70F | Hisense U8 Series 65U8QG | Roku Plus Series 55R6C7 |
|---|---|---|---|---|---|---|
| Screen Size | 55 | 77 | 98 | 75 | 65 | 55 |
| Resolution | 3840x2160 | 3840x2160 | 3840x2160 | 3840x2160 | 3840x2160 | 3840x2160 |
| Panel Type | LED | QD-OLED | QLED | Mini-LED | Mini-LED | QLED |
| Refresh Rate | 60 | 120 | 144 | 120 | 165 | 60 |
| Hdr | HDR10, HLG | HDR 10, Hybrid Log-Gamma (HLG), Dolby Vision | Dolby Vision, HDR 10+, HDR 10, Hybrid Log-Gamma (HLG) | HDR10+ | Dolby Vision, HDR 10+, HDR 10, Hybrid Log-Gamma (HLG) | Dolby Vision, HDR 10+, Hybrid Log-Gamma (HLG) |
| Smart Platform | webOS | Google TV | Google TV | Tizen | Google TV | Roku TV |
| Dolby Vision | false | true | true | false | true | true |
| Dolby Atmos | false | true | true | true | true | true |
| Hdmi Version | 2.01 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 |
| Compare | Compare | Compare | Compare | Compare |
| Product | HDR | Audio | Smart | Gaming | Display | User Sentiment | Connectivity | Social Proof | Picture Quality |
|---|---|---|---|---|---|---|---|---|---|
| LG PK340S 55" | 64.5 | 15.7 | 32.6 | 43.4 | 68.3 | 0.8 | 40.7 | 21.7 | 36.8 |
| Sony BRAVIA XR XR77A95L Compare | 91.9 | 95.5 | 90.9 | 87.4 | 98.6 | 0 | 84.9 | 88.5 | 96.4 |
| TCL QM7K Series 98QM7K Compare | 91.9 | 83.4 | 97.8 | 93.4 | 91.8 | 91 | 89.6 | 88.5 | 97.8 |
| Samsung Neo QLED QN70F Compare | 71.6 | 79.2 | 93.9 | 89 | 89.7 | 97.8 | 89.6 | 94.6 | 79.7 |
| Hisense U8 Series 65U8QG Compare | 91.9 | 97.4 | 96.2 | 96.4 | 84.8 | 79.2 | 86.9 | 77.2 | 99.5 |
| Roku Plus Series 55R6C7 Compare | 77.5 | 83.4 | 99.8 | 58.9 | 77.8 | 91 | 89.6 | 94.6 | 36.8 |
Price
Value & Pricing
Even at around $880, this is a tough sell. You're paying a premium for commercial durability and control ports, but getting a picture that's worse than a $400 Black Friday special. For a business that needs a simple, always-on digital poster and has an external media player, it might squeak by. For anyone else, it's a bad deal.
B&H Photo 1 offer From $880
Price History
Read more
Overview
The LG PK340S is a commercial display that feels completely lost in a world where even budget TVs pack more smarts and brightness. It's a 55-inch 4K screen built for hotel lobbies and retail shelves, not your living room. The one thing to know? It's a signage panel first, a TV second, and it makes zero apologies for that. If you're hunting for a home theater screen, this is a hard pass.
Common Questions
Q: Can I mount this TV in portrait mode?
Nope, and that's a real head-scratcher for a commercial display. The PK340S is landscape only. If you need a vertical setup, you'll have to step up to LG's UL3J series.
Q: Will it play a slideshow from a USB stick?
Yes, it can. You can load images or videos onto a USB drive and it'll cycle through them. It's one of the few things it does without a fight, making it okay for a very basic, standalone sign.
Q: Is this a good TV for my living room?
Absolutely not. The picture is dim, the contrast is weak, and the smart features are built for hotel menus, not Netflix. Grab a TCL or Hisense for half the price and you'll be much happier.
Who Should Skip This
If you're looking for a bright, vibrant TV for movies, gaming, or sports, this isn't it. Go get a TCL QM7K or a Roku Pro Series instead. You'll get a dramatically better picture and a smart platform that doesn't make you want to pull your hair out.
Verdict
Don't buy this for your home. Seriously. It's a commercial tool with a painfully mediocre picture and software that seems to actively fight its users. The only niche where it makes sense is a simple, non-critical digital sign in a controlled environment where you'll feed it content from a dedicated player and never touch the onboard smart features. For that one specific job, it's fine. For everything else, it's a disappointment.
