Reasons Lg TV Won’t Turn On [Step by Step Fixing]

Sometimes the LG television may fail to turn on even when there is a power supply. The common cause is the television capacitors. If the capacitors are faulty, they prevent the television from switching on or produce some noise, and it is advisable to fix the issue immediately. Also, if there is no power supply or the full LG television is completely damaged, the television may fail to turn on, among other causes.

If your LG television doesn’t come on, try turning it on with a power button on the device, not the controller. The remote control may be malfunctioning if the television turns on by pressing the Power button. If you’re certain your remote is working, make sure the line of sight between the remote and the TV’s sensor isn’t obscured. Then try again using the remote control to turn on the television.

If the television still won’t turn on, replace all of the batteries in the remote control and try again. Suppose none of the preceding troubleshooting methods succeed in turning your device on. In that case, you have two other options: Physically reboot the controller and use a remote application to turn on the LG television.

Luckily, the information below describes the common causes of the LG television failing to turn on. Also, the article summarizes the steps to follow when fixing an LG television that is failing to turn on. Ensure you follow the steps carefully to get accurate results.

Common causes of LG television failing to turn on

Several reasons result in your LG television failing to turn on, and they include the following;

  1. Faulty television fuses.
  2. Power blackout or lack of uninterrupted power supply source such as a backup generator.
  3. Worn out television capacitors.
  4. Whole television malfunctions.

Step-by-step guide on how to fix an LG television won’t turn onlg tv won't turn on

Capacitors in LG LED televisions are known to fail. If your LG LED TV doesn’t switch on or keeps making popping noises, you may be able to save repair costs by performing this easy fixation process yourself. Before beginning the repair process, it is advisable to first inspect the whole television and identify the root cause of the problems.

First, check the power supply source and turn on the switch or change the power source if the problem is the switch. Also, ensure you are careful and handle the television components carefully to avoid increasing replacement or repair costs. The following step-by-step repair guide applies to an LG television that won’t turn on; however, this simple technique is easy and involves the following;

Step 1: Collect all materials required

The main materials required include the following;

  1. Pliers.
  2. New capacitors.
  3. Wirecutter tool for cutting wires.
  4. Soldering iron as they are available at a lower price.
  5. Screwdriver.

Apart from the main materials, you may need some additional tools to make the process easier, and they include the following; solder sucker to eliminate any melted solder, a multimeter to test any faulty capacitors, a cordless screwdriver that loses casing screws holding the television in position and a flux pen to make the solder irons flow effectively without sticking.

Step 2: Remove the LG television standRemove the LG television stand

You’ll need to unscrew the stand after disconnecting everything from the television. Disconnect the television from the wall and the mounting bracket from the television’s rear if it was previously mounted on the wall.  Remove the screws indicated by red arrows to detach the TV stand. Loosen these bolts to dismantle a wall mount from your television.

Because the TV rests on top of and inside the stand, it won’t fall over when the stand screws are removed, and it’s always better to have a partner hold the television upright while you remove the stand screws. Then take it aside and place it flat on a carpeted surface, one by one.

Step 3: Dismantle the back casing from the LG televisionDismantle the back casing from the LG television

First, take a record of all the screws present that will enable you to remove the back casing of the television. Start removing the bolts one by one from the back casing using the recommended tool. The most recommended tool to carry out such a process is the cordless screwdriver

The tool makes work much easier than the normal screwdriver. When dealing with the LG television, ensure its position is always upright or flat on the surface and use less force to avoid destroying the screen or any fragile glass present.

Step 4: Disconnect the power supply

Locate the position of the power board after dismantling the back casing. Take a photo of the whiteboard as it will help during the re-assembly process. Using a recommended tug on the connecting clip, remove all power harnesses and the wiring is intact. Loosen and remove all of the screws that are securing the power board in place.

Step 5: Check the LG television capacitors and identify the faulty onesCheck the LG television capacitors and identify the faulty ones

Once the television capacitors fail to function, as usual, there will be some noticeable signs, and there are two root types of capacitor failure that include the following;

1. A fluid leaking capacitor

Fluid leakage, which is an electrolyte, is the common indicator of a failing capacitor. The leaking fluid appears to be orange or brownish emitted from the bad capacitor’s top or bottom. A bloated capacitor is usually a sign of a leaky capacitor. However, not all swelling capacitors spill.

2. Capacitor vents that bulgeCapacitor vents that bulge

Because the chemical process within the capacitor can generate hydrogen gas if it malfunctions, capacitors contain vents cut in their aluminum cans’ tops. These are designed to shatter and expel any trapped gas inside the capacitor. As a result, a failing capacitor may bulge at the top.

If you notice evidence of this on your board, you’re on your way to getting your TV fixed. If you don’t notice these indicators of failure but hear the tell-tale clicking sound, the procedures below are almost certain to fix your LG Television. After identifying a faulty television capacitor, proceed to locating the position of the faulty capacitor and trying to fix it on your own before seeking help from a technician. But, if you cannot fix the capacitor on your own, consider seeking help from a technician.

Step 6: Look for faulty capacitors on your circuit boardLook for faulty capacitors on your circuit board

Check all capacitors present in the LG television and look for any signs indicating the capacitor is failing or is faulty.  The root cause of a failing LG television capacitor is the aluminum Electrolytic Capacitors. While inspecting all the capacitors, first ensure you carefully check the aluminum electrolytic capacitors before proceeding to other capacitors. 

While checking the capacitors, ensure you wear protective gloves and carefully handle them to prevent the hands from contacting the television electrolyte. Also, wash your hands after finishing the whole process, leave the huge capacitors, and disturb them. These capacitors are high-voltage, occasionally malfunction, and need more experience to operate on for safety purposes.

Step 7: Remove the faulty CapacitorsRemove the faulty Capacitors

Polarization exists in capacitors meaning the capacitors have a positive and negative side, just like a cell. Before disconnecting any capacitor, take note of which side the white stripe is facing. Install the replacement capacitor in the same position as the old one. 

Take some notes or snap a photograph, or you will damage your LG television. Change the board’s position over and carefully determine which points on the board are from these capacitors now that you’ve detected the capacitors that appear to be bad. To keep count, use a flux-type pen to draw a circle and circle them.

Tell your partner to help you in positioning and balancing the television circuit board. It is difficult to balance the LG television circuit board on its side while using a hot soldering iron and pliers. Connect the soldering iron and wait 10 minutes for it to heat up. 

Using help from a friend, tell the person to grip one of the television capacitors with the recommended tool, pliers while the circuit board is on its edge, and carefully remove it out. Set the soldering iron point to one of the board’s back leads and retain it and wait for the solder to melt.

Shift to another lead and continue till it begins to melt. Constantly change the leads back and forward. The solder will melt faster every time. The capacitor will come out after a few times traveling back and forth. Redo the process for each capacitor that needs replacement. Leave the soldering iron to pull the television capacitor out. If the capacitor fails to come out, pull it gently and avoid using a lot of force as it can damage the capacitor or any other LG television parts.

Step 8: replace the faulty capacitorsreplace the faulty capacitors

After detecting the faulty capacitors, consider replacing the capacitors with new ones that are functioning well. Before purchasing a replacement capacitor, consider the following; capacitor microfarads, voltage, and the temperatures of the capacitor. For temperature, ensure the temperature ratings match with your LG television to protect the television from blowing. 

It is advisable to use a large voltage or recommended one instead of a small voltage for voltage. For microfarads, match both voltage and temperature with microfarads. A higher microfarad capacitor is recommended and must be within 0.2 percent.

Step 9: Install the New CapacitorsInstall the New Capacitors

Position the (-) side of the capacitor in the right place before inserting it into the television.  When there is firm solder in the hole, gently use a soldering iron to melt the solder and then insert the capacitor leads into their correct position. Fold the leads back to secure the capacitor. Cut the capacitor leads so that just around 0.125 of them protrude. Set your soldering iron on the capacitor lead and reheat it until the solder dissolves. After the solder melts onto the lead, use the iron to solder a few more rounds to properly melt the solder on the lead.

The solder will form a clean bond if you use solder flux. Wipe any flux or solder debris with a moist cloth after the capacitors have been mounted.

Step 10: Repeat the process in the reverse direction

To reverse the process, follow the following steps;

1) position the circuit board and attach it successfully to its position.

2) Reinstall all the wirings removed during the repair process.

3) Reinstall the LG television back casing to its position.

4) Test the television by turning it on. If the problem persists, seek help from a professional technician.

If the problem persists, it may be the whole television. Check the condition of the whole television and consider replacing it with a new one, especially if you have used it for a long time. Also, it is advisable to seek help from a professional technician to help you identify the main cause of the issues and troubleshoot it, especially if you are afraid or unable to carry the process on your own.

White Dots On A TV Screen? here is a fix

Frequently asked questions:

  • How can I reset my LG television remote control?

a) Tap and hold the Back and Home buttons for 5 seconds to unregister the remote. A red LED indicator will blink when the remote is unlinked.

b) Turn on the television by pressing the power button.

c) Attach the RF dongle to a USB port on the television. When you buy a dongle, it normally comes with a remote as an add-on.

d) Allow 20 seconds to pass.

e) To register the remote, press the scroll wheel.

f) If your remote control doesn’t have a scroll wheel, use the Back and Home buttons to reset it.

g) Press and hold the buttons for at least 5 seconds to reset the remote. Review your user handbook for advice on how to repair the device after that.

Conclusion

A television failing to turn on may be stressful, especially for those who like watching movies, news, or listening to music. Once your LG television fails to function, as usual, it is important to try fixing the issue of your own before seeking help. Luckily, the article above gives a step-by-step guide on fixing the problem on your own without any difficulties. But, if the issue persists, seek help. Also, you can take the television to the nearby repair shop.

Finally, when dealing with an LG television, it is important to take precautions such as; providing a power backup plan if there is a power outbreak. Also, clean the television frequently and remove any dirt and dust accumulated on the screen and inside it using a soft cloth or a vacuum cleaner. Moreover, service the television regularly to prolong its lifespan. Finally, place the television in a good position away from children as they may break the screen and increase the repair costs.

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