Toshiba TV Horizontal Lines on Screen [How to Fix]

Have you ever settled down to watch your favorite show on your Toshiba TV, only to be greeted by annoying horizontal lines messing up your viewing experience? Fret not; there are ways to fix the horizontal line on the screen of your Toshiba TV.

In this guide, we’ll explain the common reasons behind those pesky lines and, more importantly, how to banish them from your screen for good.

Toshiba TV horizontal lines on screen

What the Horizontal Line on Your Toshiba TV Means

Horizontal lines on a TV screen can be so annoying. They disrupt the seamless flow of your entertainment, turning a cozy movie night into a troubleshooting adventure. Let’s look at the causes of these lines before offering the solutions.

Common Causes of Horizontal Lines on Your Toshiba TV

Here are four probable causes of the horizontal line on your Toshiba TV:

1. Loose Cable Connections

Often, this horizontal line appear when the cable connections behind your TV is weak, obstructed, or loose. Of course, loose or damaged cables connecting your Toshiba TV to external devices can lead to signal disruptions.

2. Faulty HDMI Ports

A faulty HDMI port can also distort the signal, manifesting as horizontal lines on the screen. The delicate pins inside the HDMI connector can become bent or even break due to improper plugging/unplugging or external pressure.

This can disrupt the signal transmission, leading to visual glitches like horizontal lines. Besides, note that regular wear and tear of HDMI ports can contribute to this issue.

Meanwhile, dust, grime, or even corrosion can accumulate within the port over time, obstructing the electrical contact. This can cause signal interference, manifesting as lines on the screen.

3. Signal Interference

This is usually in the form of electromagnetic interference (EMI). EMI comes from external sources like power lines, radio waves, or even other electronic devices. It can disrupt the delicate electrical signals within the HDMI cable, causing errors and corruption in the video data. These errors can manifest as horizontal lines of varying color or thickness on the screen.

4. Internal TV Issues

While faulty HDMI ports and signal interference are common culprits behind horizontal lines on TVs, internal TV issues can also play a role. Note that the mainboard houses the TV’s processing unit, memory, and other crucial components. If these components malfunction due to overheating, component failure, or power surges, they can disrupt video processing and lead to visual glitches like horizontal lines.

5. Digital Errors

Glitches or errors within the digital video signal itself, caused by faulty cable connections, data transmission issues, or even software bugs in the TV or source device, can also result in lines appearing on the screen. These lines might be static, flickering, or move around depending on the nature of the error.

How To Fix Toshiba TV Horizontal Lines on Screen

Follow these steps to troubleshoot and fix the horizontal lines on your Toshiba TV:

1. Check Cable Connections

The solution might be as simple as ensuring all cables are snug and secure. While checking the cable connections, focus on the following:

  • Inspect HDMI Cables: Examine the HDMI cables connecting your TV to external devices. Replace any damaged cables and ensure a proper fit.
  • Reconnect Devices: Unplug and reconnect all devices connected to your TV, such as gaming consoles or streaming devices. Sometimes, a loose connection is all it takes to create havoc.

2. Test Different HDMI Ports

If you suspect a faulty HDMI port, you might need to engage in a little experimentation to get things in order. Here are the things to do:

  • Switch HDMI Ports: Try connecting your external devices to different HDMI ports on your Toshiba TV. If the lines persist on one port but not on others, you’ve identified a problematic port.
  • Inspect for Damage: Examine the HDMI ports for physical damage. If you notice bent pins or other issues, it’s time to call in professional help.

3. Address Signal Interference

Electronic interference can wreak havoc on your TV’s display. Here’s how to avoid signal interference:

  • Move Electronic Devices: If possible, relocate electronic devices near your TV that might be causing interference. Devices like cordless phones or routers can be common culprits.
  • Use Shielded Cables: Invest in shielded cables to reduce the impact of external interference on your TV signal.

4. Perform a Power Cycle

Sometimes, a good old power cycle can work wonders in resolving minor glitches on a TV. That is to say that you can also power off the TV for a few minutes. Here’s how to go about it:

  • Turn Off and Unplug: Power down your Toshiba TV and unplug it from the electrical outlet.
  • Wait for a Few Minutes: Let the TV sit without power for at least five minutes. This allows any residual charge to dissipate.
  • Reconnect and Power On: Plug the TV back in and power it on. Check if the horizontal lines have disappeared.

5. Factory Reset

When all else fails, a factory reset might be what your TV needs. Follow these steps to reset your Toshiba TV safely:

  • Access Settings Menu: Navigate to the settings menu on your Toshiba TV using your remote.
  • Find Reset Option: Look for a reset or factory reset option. This might be under “System,” “General,” or a similar category. For most Toshiba Fire TV, you have to go to Settings > Device & Software > Reset to Factory Defaults.
  • Perform Reset: Follow the on-screen instructions to perform a factory reset. Note that this will erase all customized settings, so be prepared to set them up again.

Tip: Before performing a factory reset, make a note of your custom settings or take pictures for easy reconfiguration. Mind you, if all the solutions above didn’t fix the problem, have a technician check your TV. 

Related: How to Fix ‘Toshiba Fire TV Screen Flickering’

Final Note

Dealing with horizontal lines on your Toshiba TV can be a hassle, but armed with these troubleshooting tips, you’re well-equipped to restore order to your entertainment haven.

When attempting to fix the horizontal line on your Toshiba TV, remember to approach the problem systematically, starting with the basics like cable connections and gradually moving to more complex solutions if needed. If the issue persists, don’t hesitate to seek professional assistance. 

See Also: How to Reset Toshiba Fire TV Remote