Nowadays, LED TVs are popular, and they got their name from the type of backlight. LED backlighting, for the light source (WHICH ILLUMINATES THE IMAGE), uses LED (Light emitting diodes) diodes that emit light.
WHAT ARE THE TYPICAL PROBLEMS OF SMART LED TVS?
FAILURE #1: LED backlight goes out
LED backlighting is the first to fail on current LED TVs. You are left with no image and the sound is present. Actually the image is present but not visible because it is not illuminated.
We do not advise you to try to replace the LED strips yourself because the panel (display) on the LED TV is only slightly more than 1mm thick, and if you do not have experience, the probability of breaking it is very high.
If this happens, either you have permanently lost the TV, or the cost of replacing the panel and backlight will question the profitability of such an undertaking, it will be more than the price of a new TV.
An authorized TV service replaces the backlight, quickly, efficiently and with compatible led strips, but also with a guarantee.
It also successfully solves all other potential faults on LCD TVs.
Photo: LED TV backlight
Newer TVs are now mostly SMART versions, which means they have the ability to connect to the Internet, use the Android operating system, and applications that are massively used in that system, such as YouTube, Chrome, Facebook, Netflix, etc.
The connection is mostly WiFi (wireless), but it is also possible to use a wired network cable. As a service technician, I can say that the stability of those smart TVs is not at an enviable level, especially when you are often on the Internet, because you are actually exposed to various malicious software threats.
Failure No. 2 : Android System Crashes
There is a system crash and Android can't boot up, so as a result the tv just spins the manufacturer's LOGO and can't boot up the system!
What is the solution in those situations? The solution is to reinstall the operating system.
The installation is recorded on a USB flash memory, inserted into the TV's USB port and the system is reinstalled with the appropriate procedure.
Reinstallation is possible if the motherboard is correct, i.e. if there is a correct EMMC or NAND chip on the motherboard, the system installation is written into that chip.
For more serious manufacturers, you can find the software on the official website of the TV manufacturer, on the support page. You have to keep in mind that when you buy a cheaper television set from a non-reputable manufacturer, you don't have any online support, outside the warranty period, and often during the warranty period.
photo: reinstall software on your TV
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FAILURE No. 3: MOTHER BOARD FAILURE
The motherboard is often under attack, when there are atmospheric discharges and thunderstorms in your area. The high voltage produces an electric shock, and through the receiver and HDMI cable, it directly burns the processor and thus the motherboard is dead. If the impact is weaker, it often causes only the failure of the HDMI input to begin with, but later the rest (the processor) also fails.
When the processor is dead, the motherboard is also dead, it does not respond to the remote control and the signal light does not light up, or it may light up but not respond.
In such cases, the solution is to replace the motherboard. Motherboard repair in the sense of processor replacement can only be done by highly specialized services, but this endeavor is usually as expensive as a new motherboard.
Failure No. 4. On the screen you see horizontal or vertical lines (Stripes), which either vibrate or are still, even worse you have a blank screen in front of you!
As TV technology develops, so does the resolution of the built-in panels. Now popular are 4K (UHD) panels, whose resolution is 3840x2160. That's double the previous FHD (Full HD). And our service experience is that they break down twice as often. As TVs get bigger, 55", 65", 75", 85", etc. thus, the demands of making such panels are increasing.
Mounting large LED TVs on the wall - EXPERIENCES
As a service, I want to share the experience gained during many years of work related to hanging large LED televisions on the wall. Such TVs often arrive at the service center with a defective panel or screen. We concluded that almost 80% of those devices were hung on the wall. The explanation is as follows: The chassis of the TV is made of a relatively thin sheet, and when you screw it to the holes left for this in the middle, there is a certain distortion of the chassis (due to the weight of the device itself), and therefore there is pressure on the panel. The panel is glass with a thickness of only 1-2 mm and the lines inside the glass also suffer from this distortion and loosen over time. A power failure occurs in the side image drivers, and the image is either lost or distorted. There is usually no help, that is, the only solution is to replace the panel, and it is either not available or too expensive!!!
Conclusion: placing the TV on a stand is a safer option per panel (screen)!!!
photo: LED TV displey (panel) problem
Fault no. 5. Failure of the power supply board on the TV
Voltage oscillations, thunder, or poor quality of the components in the power supply part of the board, can result in failure of the TV power supply.
Up until now, more serious televisions generally had a separate power supply and processor part, that is, a separate power supply and processor board.
However, more and more, mainly due to savings, these two plates are joined into one. This certainly reduces the quality of the TV set, i.e. increases its vulnerability.
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