The one-minute version
Most "extend your TV's life" advice online is left over from the CRT and old-backlight era. On a modern television there are only four things worth your attention:
- Heat — Samsung officially requires at least 10 cm of clearance on every side
- Humidity — in Hong Kong this is a real threat, not a theoretical one
- Power surges — typhoon season, solved by one power strip
- Long static images on OLED — OLED only; LCD-based sets are not affected
Everything else — how often you switch it on and off, how many hours a day you watch — is not something you need to worry about. Below is why, point by point.
First, three claims you can stop worrying about
"Don't switch it on and off so much"
This comes from the CRT and cold-cathode backlight era. Modern LED backlights and OLED panels do not behave that way.
The simplest counter-evidence: every Samsung and LG set ships with auto power-off and eco modes, and both companies actively market them as features. If power cycling really damaged the set, they would not build it in.
"Only use it 8 to 10 hours a day"
No manufacturer has ever published that figure.
The opposite is on record: describing the Pixel Refresher, LG characterises 2,000 cumulative hours as "roughly five hours daily for one year" — LG treats five hours a day as ordinary use, and built compensation technology specifically to cover it.
"Standby is better than switching off"
For OLED this is exactly backwards. LG states officially that the OLED Pixel Refresher runs after you turn the set off with the remote, triggering once every four cumulative viewing hours.
Put another way: turning the TV off normally with the remote is the moment the panel does its own maintenance.
Heat: Samsung specifies 10 cm
Heat is one of the few items with an actual published requirement. Samsung's official support documentation states that the top, bottom and sides should be at least 10 cm away from other objects. It also states the set should never exceed 40°C.
The Hong Kong version of this problem
Hong Kong room temperatures are already high in summer. Put the set inside a fitted cabinet with its back against the wall and there is no clearance left at all. Built-in TV cabinets are the most common heat trap in Hong Kong homes.
Three things to do
- Leave at least 10 cm on every side, especially behind and above
- Do not put anything on top of the set — that is usually where the exhaust vents are
- If the vents have collected dust, lift it off with a vacuum on a small nozzle. Do not scrub
Humidity: the most underrated factor here
Every March and April Hong Kong's humidity sits in the eighties and nineties for weeks. That is a bigger threat to electronics than most people assume — moisture works its way inside and slowly oxidises boards and contacts.
What to do in the humid months
- Run a dehumidifier, or your air conditioner's dry mode, and keep indoor humidity below 60%
- Do not put the set on the wall facing a window you open frequently
- Away for a long stretch (a month's travel, say)? Cover it with a breathable cloth, never a plastic bag — plastic traps moisture against the set and makes things worse
If moisture has already got in
Watermark-like shadows on the picture, slow start-up, or intermittent loss of signal can all be symptoms. Do not open the set up and point a hairdryer at it. Opening the chassis generally ends your warranty on the spot, and hot air will warp the panel.
Power surges: typhoon season
Hong Kong's typhoon season runs from May to November. The voltage swing when power drops and comes back is a real cause of appliance failure.
Two measures
- Day to day: use a power strip with surge protection. It is a one-off cost, lower than any single repair.
- Before a T8 signal: if an outage is likely, unplugging is sensible.
But don't make unplugging a daily habit
LG warns explicitly: "Pixel cleaning function will not be executed if you unplug the power cord or turn off the power strip switch when shutting down the TV."
So if you own an OLED, unplugging every night actively prevents the panel from maintaining itself. Unplugging before a typhoon is an exception, not a routine.
Burn-in: separate OLED from LCD
Plenty of care articles lump OLED and QLED together and say both burn in. That is wrong, and it frightens people who have nothing to worry about.
| Technology | Can it burn in? | Why |
|---|---|---|
| OLED | At risk | Each pixel emits its own light and ages individually under sustained brightness |
| QLED | No | LCD architecture, lit by a backlight |
| Neo QLED (Mini LED) | No | Same, just with a finer backlight |
| Crystal UHD | No | Same |
Samsung's own position: QLED sets "aren't susceptible to screen burn like other TV's on the market".
If you own an OLED
LG already builds in three layers of prevention: Screen Shift (nudges static areas), Logo Luminance Adjustment (detects channel logos and dims those areas), and TPC (identifies high-risk static images and adjusts luminance), plus Pixel Refresher for after-the-fact compensation.
Your part is only two things: do not leave a news channel or a game menu frozen on screen for hours, and turn the set off with the remote so Pixel Refresher gets a chance to run.
To see which OLED models we carry, visit the OLED TV collection.
If you own an LCD-based set
Crystal UHD, QLED and Neo QLED are all LCD architecture and cannot burn in. You may see brief image retention, but it clears within minutes of changing content. It is not permanent damage.
Cleaning: Samsung's actual instructions (not the ones you've heard)
This section is worth following to the letter, because damaging the anti-glare coating is irreversible. These are the rules from Samsung's official support documentation:
| Do | Don't |
|---|---|
| Unplug the set before you start | Clean it while it is running |
| Use a dry microfibre cloth | Use tissues, kitchen roll or scouring pads |
| Stubborn marks: mist a little plain water onto the cloth | Spray anything directly onto the screen |
| Wipe gently in one direction | Scrub in circles with pressure |
| Use plain water only | Use window cleaner, soap, alcohol, ammonia or scouring powder |
Samsung's wording is blunt: "Never use cleaning fluids, wax or chemicals" and "Never use abrasive pads or paper towels. If you do, you can scratch the screen or strip the anti-glare coating off the screen and cause permanent damage."
So the "screen-safe cleaning solution" you see sold everywhere is not something Samsung recommends. A dry cloth, with a little plain water on the cloth at most.
How often
When you can see dust. There is no benefit to a fixed schedule — every wipe is friction, so the more often you clean, the faster the coating wears.
Picture settings: about power and accuracy, not lifespan
Lowering brightness does save power, and on OLED it does reduce pixel ageing. But on LCD-based sets, the link between settings and lifespan is far weaker than the internet suggests.
The real reason to change the settings is picture accuracy: the factory default is usually Standard or Dynamic, with a blue-shifted colour temperature and sharpening pushed too hard. Switching to Movie or Filmmaker Mode makes colour markedly more accurate.
Also use different brightness by day and by night — Hong Kong living rooms swing hard between the two, and one setting all day means squinting in the afternoon and glare after dark.
Software updates
Both Tizen (Samsung) and webOS (LG) push updates covering streaming app compatibility, picture processing improvements and security fixes.
Find "Software Update" in the settings menu and turn automatic updates on. Do not unplug the set mid-update.
Frequently asked questions
How long should a TV last?
No manufacturer publishes a rated lifespan. In practice what decides it is heat, humidity and your electrical supply — not hours watched.
Will watching 10 hours a day damage it?
No manufacturer material supports that idea. LG itself treats "roughly five hours daily for one year" as a normal usage baseline in its own calculations.
Should I use standby or switch it off?
Switch it off with the remote. On an OLED that also triggers Pixel Refresher, which is a good thing.
Should I unplug it every day?
No. LG states plainly that unplugging prevents pixel cleaning from running. A likely typhoon outage is the exception.
Can I clean the screen with an alcohol wipe?
No. Samsung explicitly lists alcohol among the prohibited substances — it strips the anti-glare coating, and that damage is permanent.
The picture has dimmed after a few years. Is that normal?
Both LED backlights and OLED panels dim slowly over time, and that is ordinary ageing. But a noticeable drop over a short period, or dark patches in specific areas, is not normal and should be looked at.
What is the difference between image retention and burn-in?
Image retention is temporary and clears within minutes of changing content. Burn-in is permanent. LCD-based sets only ever get retention; they do not burn in.
Repair or replace
Worth repairing
- Won't power on, no sound, no HDMI signal — usually the power board or mainboard, and a part replacement fixes it
- Cuts out and restarts intermittently — normally power-related as well
- The set is still inside its warranty period
Worth replacing
- The panel itself has failed (cracks, large dark patches, full-height lines) — the panel is the single most expensive part of a television, so replacing it rarely adds up
- The set is eight to ten years old and parts are no longer supplied
- The repair quote exceeds half the price of a new set the same size
If it is the latter, we stock the full range: Crystal UHD (entry 4K), Mini LED (bright rooms and gaming) and OLED (dark-room film watching).
Our warranty
Every television fails eventually, which is exactly why the warranty matters when you buy one. Our terms:
- Warranty: free on-site inspection and repair within three years. Replacement parts are quoted separately — we quote first, and only proceed once you confirm.
- Sourcing: not local Hong Kong retail stock — international version, warranty provided by us.
- On-site: inspection and repair are both done at your home. You do not have to carry the set anywhere.
- Installation: on-site installation available, quoted by address.
- Full terms: see the delivery and warranty terms.
- Showroom: Room 403, Block A, Chung Mei Centre, Kwun Tong, 11:00–19:00.
If your set is playing up, WhatsApp +852 9847 9793 with the model and the symptom and we will tell you whether it is a settings issue or needs a visit.
