You’re watching an action movie and, suddenly… boom!
The villain triggers a huge explosion.
Your TV turns white from the blast for a few seconds.
Okay, for a few minutes.
But now it’s just getting ridiculous. Why is it still white?
Maybe we can help…
Keep reading to discover:
- 5 ways to fix the LG TV white screen issue.
- How to recalibrate the white balance of your LG TV.
- What you can do when your screen has bright white dots.
- Why your backlight is open but your TV won’t show any display.
- And so much more…
Why has my LG TV screen gone white?
Your LG TV’s screen has gone white because of a broken diode on your backlight. A loose or defective ribbon cable can also cause your TV to display nothing. If not those two, it’s also possible that your power board is failing. Lastly, it could also just be because of your white balance settings.
LG TV white screen problem: 5 fixes
#1: Recalibrate white balance
Can you still watch movies and shows on your TV…
But everything is somewhat whiter?
If this is the case, then your TV’s picture settings are the culprit.
More specifically, its white balance settings.
Normally, white balance just tweaks the temperature settings of your TV. Making your screen cooler or warmer.
However, these settings can be cranked up to the extremes.
Thus making your display whiter than most.
Changing white balance settings
To change your white balance settings, you should:
- On your remote, press the ‘Settings’ button.
- Go to ‘Picture’.
- Select ‘Picture Mode Settings’.
- Go to ‘Advanced Controls’.
- Scroll down to ‘Expert Controls’.
- Press ‘White Balance’.
From there, play with your settings until you find the look you like the most.
Factory reset LG TV
Alternatively, if you want to skip the trial and error part, you can just reset your settings to default.
By factory resetting it.
On LG TVs, you can do this by:
- Press the ‘Settings’ button on your remote.
- Go to ‘All Settings’.
- Select ‘General’.
- Click ‘Reset to Initial Settings’.
This will remove all changed settings and cache on your TV.
#2: Reattach connectors
Is your TV’s backlight still on but there’s no display on your TV?
If so, your ribbon cables must be loose or broken.
These connect your TV’s hardware with each other.
Thus, allowing the individual parts to communicate.
“So how can this disable my screen but not the backlight?” you ask?
Well, your TV has around 5 different boards. Each of them has its own functions.
The most common of these boards are:
- T-Con board.
- Power board.
- Backlight inverter.
- Network or Wi-Fi board.
- Mainboard or motherboard.
If the cable between the mainboard and the T-Con board is loose, your TV might not show any display.
This is because the T-Con board controls your TV’s picture, but not the backlight.
So, when this happens, how can you fix it?
Note: Always take a picture when you’re removing or replacing anything from your TV. This will help you when you’re putting everything back together.
Step 1: Open the back of your TV
- Lay your TV down on soft material.
- Using a screwdriver, remove all screws from the back of your TV.
- Lift the plastic casing.
Step 2: Attach or change the cables
- Locate the ribbon cables.
- First, check if they’re loose or broken.
- If it’s the former, simply reattach them.
- If they’re broken, remove the cables.
- Buy a replacement ribbon cable that’s compatible with your TV.
- Replace the old cables with the new ones.
- Put everything back together.
#3: Repair power board
Turn your LG off then press the power button on your remote.
Does your TV…
- Not turn on except for the red standby light?
- Flash bright white then turn off immediately?
- Flicker between the color white and its display?
If the answer is yes to any one of these, then your power board is the problem.
The power board of your TV receives the electricity that comes from your source.
Then, it distributes this power to the other parts of your TV depending on how much they need.
Sometimes, a surge can destroy your power board by overloading it.
But it’s also possible for overuse or age to damage this board.
In any case, you can fix it with these 4 steps:
Step 1: Prepare your multimeter
The multimeter is a device used by electricians to measure:
To determine if your power board is defective, you must measure its voltage first.
You can do that with a multimeter.
This is how:
- Buy a multimeter.
- Read the instructions on how to read the voltage as it’s different for every multimeter.
- Wrap a thin metal around the red test pin.
- Open your multimeter.
Step 2: Test voltage
The next thing to do is to use the multimeter.
For this, you must prepare a screwdriver. And remove the screws from your TV as you open it.
To measure the voltage coming to your TV, you must:
- Open the back of your TV.
- Locate the power board. It’s the one with capacitors, which often look like tiny batteries.
- Put the black pin of your multimeter in a grounding tab or any metal.
- Insert the red pin inside all cables one by one.
There should be an indicator of the normal voltage amount beside the ports of the cable.
The number you measure from the multimeter should match this voltage amount.
If it doesn’t, you can proceed to step #3.
Step 3: Check for swollen capacitors
Capacitors are the most susceptible part of your power board.
If one of them is broken, you can either replace your entire board or…
If you’re frugal, just solder new capacitors in.
Warning: A wrong move can electrocute you or, worse, destroy the entire TV. Proceed only if you have the technical know-how.
- Check if your capacitors are swollen.
- If so, install new capacitors.
- If there are no bad caps, proceed to the next step.
Step 4: Replace the whole board
Lastly, if the damage extends to the entire power board, you have no choice but to replace it.
This is how:
- Unscrew the power board from the chassis.
- Buy a replacement board that’s compatible with your LG TV.
- Place and screw the new board to the chassis.
- Put everything back together.
If you need any help learning how to use a multimeter, you can watch:
Further reading: LG TV Keeps Turning Off: 9 Ways To Fix It
#4: Replace the backlight
Is the whiteness of your TV only concentrated on some spots?
Like large bright white dots at the bottom of your screen?
Then, it should be your backlight that’s defective.
This happens when a diode has fallen from the LED strip.
Fortunately, you can replace your backlight strips easily.
Step 1: Access the backlight
- Open the back of your TV.
- Remove all cables and wires.
- Flip your TV over.
- For safety, tape the boards at the bottom of your TV to the screen.
- Remove the first white sheet or light filters by removing the tabs on its sides.
- Remove the second white sheet or the diffuser panel.
You should now see your backlight diodes.
From here, plug your TV in and look at the lights.
Is one of them not turning on? Or maybe a few of them has fallen off?
In either case, you can now proceed to replace your backlight.
Step 2: Replace the backlight
- Remove the tabs in between the backlights.
- Using a 5-in-1 tool or any thin blade, remove the old stickers.
- Place strips of double-sided tape where the stickers were.
- Place the new lines of the backlight using the tape as your guide.
#5: Contact LG
Are you like me who’s worried about every little thing?
It’s okay to feel that way, especially when handling electronics.
If you’re unsure of your own technical skills, it’s always better not to fix your TV DIY.
Instead, call LG themselves.