As an owner of a TCL TV, I was getting frustrated trying to figure out why my TV had blue lines running through it. After hours of research and testing, I’m here to share how I solved the issue and some other solutions I discovered along the way.
The most common causes of the blue lines issue on TCL TVs are loose or blocked cable connections, visual screen or component damage, or a faulty t-con board.
| Tips for Fixing Blue Lines on TCL TVs |
|---|
| Loose or blocked cables are common causes for blue lines on TCL TVs. |
| Clean out the connector piece before reconnecting the cable and television. |
| Impact or damage to the backlighting component or screen is also a possible cause. |
| Check both ends of all video cables, visually search for any damage, and switch the TV input to a different HDMI port. |
| A damaged or faulty T-con board can cause blue lines to appear. |
| Run a picture test and reset the settings to factory defaults. |
Table of Contents
Why does my TCL TV have blue lines?
Below are likely reasons why your TCL TV has been experiencing blue lines.
Loose cables
A common reason for blue lines is loose cables. Loose cables can result in a poor connection to the television from another device. If you’ve shifted around your TV, this could be the reason you’re experiencing blue lines.
Loose cables are less likely to be the cause if there are blue lines when you are streaming content online.
Material or debris cable disruption
Another common cause is debris resulting in an interruption to the connection. Debris, dust, or other material can interrupt the connection, so it’s also important to clean out the connector piece before reconnecting the cable and television. Don’t forget to check the other end of the cable as well.
Damage
Another possible reason is that the TV is actually faulty.
Damage to the screen or unit due to impact from an object or the floor is one of the leading causes of anomalies.
The backlighting component inside your set provides the screen with light, so if it gets damaged or blocked, the light will only shine through on certain lines.
Another part that could be damaged is the screen. If it absorbs some sort of impact, it can cause a variety of line colors to appear, including blue.
Faulty t-con board
A TCL T-con board generates the vertical and horizontal timing panel signals while enabling signals and providing panel boas.
This component looks like a computer motherboard and controls the logic gate signal and serves as the source for propelling the thin-film transistor (TFT) LCD.
Since this component directly controls the vertical and horizontal signals, it could cause blue lines to appear.
How to fix the blue lines on a TCL TV
The blue lines could be a simple or complicated fix, depending on if there’s damage to any part of the television.
However, below are the options you have when getting rid of them.
Check the cables
The first step you should take is to check both ends of all video cables.
As mentioned earlier, the connections could be loose, especially if you recently shifted around the television, or could have material blocking the connection between the cable and the TCL TV input or set-top box output and cable.
Damage
Next, conduct a visual search for any damage that could be present. If the TCL TV has recently fallen on the ground or sustained some form of impact, then you want to
Television settings
If the root cause isn’t damage or loose cables, try changing or resetting your TCL TV’s video settings.
Start by switching the TV input to a different HDMI port since the one you’re using could be defective or damaged.
This may also help rule out different ports. Remember to switch the input on the television as well so you don’t receive a “no signal” error.
T-con board
While this might seem like an outdated gesture from the analog antenna days to get the picture to show but give the back of your TCL TV a tap.
This sometimes causes the internal componentry to reconnect if loose. If it briefly works but lines reappear, then you may have problems with your T-Con board.
Once the T-con board is damaged, faulty, or has an issue, it will need to be replaced to ensure a properly functioning television.
Picture test
Many modern TCL TVs have an integrated feature that allows you to see if your display is corrupted.
Different TCL models have different interfaces that display this information, but you can usually find this function in the settings menu along with a support or troubleshooting option.
Some models just have a picture test option that provides the results. This is a crucial step if you’re planning to contact technical support.
Reset to factory defaults
It would also help. to try testing the settings of your TV to their factory defaults.
Read more: How long do TCL TVs last
