4 Common problems with LED TV and their diagnosis

led tv problem

Following are 4 of the most common problems with LED Televisions faced by customers worldwide.

LED TV screen goes blank

blank led tv screen

In this case, most probably the power supply unit inside the LED TV has issues. The power supply unit is responsible for receiving current and sending it to all the components of the LED TV. The power supply unit develops issues due to a sudden surge in input supply. Usually, the capacitors on the power supply boards fail. If you disassemble the LED TV set, you could verify this by spotting a leaking or bulging capacitor. These problems are common in modern LED Televisions and the repair work is fairly simple and quick. It is recommended to find a technician as replacing the capacitor would require soldering skills.

Additionally, if you are looking for the right mounts for your TV, check out the detailed article regarding mounting TV at a corner.

LED TV has Horizontal lines on start-up

In this case, the root of the problem is low signal strength in the set-top box cable that is connected to the LED TV. This problem might not show up if you plug that set-top box to an old television. The reason for this is that older TV sets required lower input strength to work. With the modern LED TVs set it’s not the case. They require stronger input signals. Thus, switching to an HD set-top box will most probably rectify the problem.

LED TV with no sound output

Disconnect the LED TV from the AC power, then press and hold the power button on the LED TV (not the remote) for 10 seconds. After waiting for a minute, connect the TV set back to AC supply and press power button once. Then try out other “sound out” from your TV to a set of speakers. If the speakers work, clearly the internal TV speakers are not working. If it doesn’t, it is most likely that the audio IC that drives the internal speakers has failed. It is common in these sets as they use inexpensive low powered amplifier ICs that heat up and fail. A simple replacement of the audio IC will do the trick here.

LED TV not connecting to WiFi

The first step is to locate if the problem is in the TV  or the router. If the TV has no problems in connecting to your mobile device, then probably the router is at fault. Try updating the firmware of the router. If that doesn’t work, factory reset the router. This should do the trick

You could also borrow a WiFi extender and test if the TV connects to the internet. If the signal strength is not the issue consider getting a USB wifi adapter for the LED TV.

Our Pick

Here are some other good WiFi extenders and USB WiFi adapters available on Amazon, via reliable sellers,  that could help you resolve the issue:

  1. Mercusys MW300RE Wireless Repeater WiFi Booster 
  2. TP-Link Deco M3W AC1200 Whole Home Mesh Wi-Fi System Add-on Unit, Wall-Plug Extender, Work with Amazon Alexa, Router/Wi-Fi Booster, Parent Control, Qualcomm CPU 
  3. Netgear EX6110 AC1200 WiFi Range Extender (White) 
  4. D-Link DAP-1610 AC1200 Wi-Fi Range Extender 
  5. Tenda A301 V2 Wireless N300 Universal Range Extender/Repeater 

WiFi Adapters

Our Pick
  1. TP-Link TL-WN821N 300Mbps Wireless N USB Adapter (Black/White) 
  2. YGS® HDMI/WiFi Receiver 1080P TV DLNA Wireless Dongle (Black) 
  3. Rampotox TV Dongle Receiver Wireless WiFi 1080P Full HD HDMI Display Supports Windows iOS, Android Black 

For any there queries regarding LED TV problems, please feel free to comment in the section below.

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    Thanks for providing this helpful information about led tv repair issues
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    About 3 years ago we changed the LEDs in the set , a few days ago the picture goes on and off repeatedly, I checked the voltage out to the LEDs and no voltage was on,I checked the caps and found 2 with a esr higher the .5 , if I changed them would it repair the problem.

  5. 5

    Hopefully you’ve changed the photo in future posts, this one shows a plasma screen (light grey when switched off) and not an led screen!

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    Nice Blog!
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    Thanks for providing this helpful information about Sony television issues.
    Waiting for another blog
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    My gld analogue tv started going off after every ten mins.. I used to doubt the power cable adapter

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    Life star TV 32 inch, starts normaly with minor flickering and blinking and later 3-5 minets working.what should I do

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    My UKA led tv turn plane white after switching it off before bed only to switch on the next day to find it blank white pls help

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