Overheating can permanently damage an LCD TV. The most obvious symptom of overheating is a sudden shut-down when the TV can no longer run properly. In most cases, overheating is easy to fix, requiring little more than some repositioning or cleaning.
All LCD televisions feature small ventilation slots to keep air flowing inside the panel and keep things cool. Always keep these vents unobstructed and dust them regularly to improve air movement within the TV. The dust can also get inside the panel and cause other problems inside the TV, making it doubly important to keep your vents dust-free.
Cans of compressed air are tempting to use for quick cleaning but may blow dust inside your TV's vents. Instead, use a microfiber cloth or unscented electrostatic cloth and gentle pressure to wipe the dust away.
Once the vents are cleared, improving overall airflow to your TV's panel is imperative. Tightly enclosed spaces trap heat, making it harder for your TV to properly dissipate heat even with clean vents. Replace tightly enclosed entertainment centers with a more open design if possible, or consider mounting your TV on the wall. If necessary, add a small fan within the enclosure or set a standing fan to blow inside.
Many modern LCD TVs feature USB ports. An inexpensive USB fan may be a handy addition to your TV, especially since it only relies on the TV itself for power. Try to position these fans so they're blowing air into the TV's vents, or in a way that draws cooler air into the enclosure.
Always hang a TV wall mount on a stud, away from in-wall electrical wiring. Use an electricity-detecting stud-finder to find a suitable spot to hang your TV.
Remove Heat Sources
If the vents are clear and airflow around your TV is good, but it's still overheating, an external heat source may be the problem. If your TV is nearby a heating vent, close the vent. Move portable heaters elsewhere to reduce their impact on your TV's overall temperature. If your TV spends a lot of time in direct sunlight, move it elsewhere.
Moving your TV out of direct sunlight also reduces glare, making for a more pleasant viewing experience.
Check for Recalls
If you've followed all the troubleshooting steps and still are having issues with overheating, check online to see if there is a product recall out for your TV. Sony had to recall 1.6 million LCD TVs in 2011 due to a defect that caused overheating, smoking and even melting parts.
Contact Technical Support
If none of the tips presented above have helped with your TV's overheating problem, it's possible a part on your TV is malfunctioning or defective. A repair attempt by someone not professionally trained in electronics repair may result in further damage. Contact customer support for further diagnosis and troubleshooting steps. If your TV's manufacturer isn't listed below, check your owner's manual or the manufacturer's website for contact information.
If your TV is still under warranty, make sure it's repaired by someone certified by the manufacturer or the warranty may be voided.