Well, bellow is the step-by-step guidelines to troubleshoot the issue;
Step 1: Power Cycle Your Onn TV
Power cycling is the first and easiest step to try. It helps reset the TV by draining all residual power, which can sometimes fix glitches that cause the screen to go black.
How to Power Cycle:
- Turn off your TV using the remote or the power button on the TV.
- Unplug the TV from the wall socket.
- Wait at least 60 seconds. During this time, press and hold the power button on the TV for 30 seconds to ensure all power is drained.
- Plug the TV back into the wall socket.
- Turn on the TV and check if the screen is still black.
Why This Works?
Power cycling clears temporary software issues that may be causing the black screen.
It’s a simple yet effective solution for many TV problems.
Step 2: Check All Cables and Connections
Loose or damaged cables are a common cause of black screens. Checking each cable ensures that your TV is receiving the necessary inputs and power.
What to Check:
- Power Cable: Ensure it’s securely connected to both the TV and the wall socket. Try a different socket if possible.
- HDMI Cables: If you have devices connected via HDMI (like a gaming console or streaming device), check that the cables are firmly plugged in and not damaged.
- Other Cables: If you’re using AV cables or other types of connections, ensure they are secure.
Pro Tip: Invest in high-quality cables like the Belkin Ultra 2.1 HDMI cable, which can provide a more stable connection and reduce the chances of screen issues.
Step 3: Verify Input Settings
Your Onn TV might be showing a black screen because it’s set to the wrong input source.
This can happen if the input was changed accidentally or if the connected device isn’t powered on.
How to Check:
- Press the “Input” button on your remote.
- Navigate through the input options using the directional buttons.
- Select the correct input for your device (HDMI 1, HDMI 2, etc.).
- Ensure the connected device (like a cable box or game console) is powered on.
Why This Matters?
If the TV is set to an inactive input, it will display a black screen, giving the impression that the TV isn’t working.
Step 4: Test Your Remote Control
Your remote is an essential tool for controlling the TV, and if it’s malfunctioning, it could lead to the TV not responding or displaying a black screen.
Steps to Diagnose:
- Check the Batteries: Replace the batteries if you haven’t done so in a while.
- Test the IR Blaster: Use your phone’s camera to check if the IR blaster is working. Point the remote at your phone’s camera and press a button on the remote. If you see a light on the camera screen, the remote is functioning.
- Use the TV Buttons: If the remote is still unresponsive, try using the buttons on the TV itself to navigate the menu and settings.
Advanced Tip: Consider getting a universal remote or using a smartphone app if your remote isn’t working, as these can sometimes bypass issues with the standard remote.
Step 5: Disable the Sleep Timer
Onn TVs have a sleep timer feature that automatically turns off the screen after a set period of inactivity.
This might be the cause of the black screen if it’s enabled.
How to Turn Off the Sleep Timer:
- Press the “Home” button on your Roku remote.
- Go to Settings > System > Time.
- Select Sleep Timer.
- Ensure the timer is turned off.
Why This is Important?
Disabling the sleep timer prevents the TV from turning off the screen automatically, ensuring continuous viewing without interruptions.
Step 6: Perform a Soft Restart with Keybinds
If your Onn TV has a Roku built-in, you can use a specific keybind sequence to perform a soft restart, which may fix the black screen issue.
Keybind Sequence:
- Press the Home button five times.
- Press the Up button once.
- Press Rewind twice.
- Press Fast Forward twice.
When to Use This?
If power cycling doesn’t work, the keybind restart can serve as a quick alternative to fully resetting the TV.
Step 7: Plug Into a Different Power Outlet
Sometimes, the power outlet might not provide sufficient power to the TV, causing it to malfunction.
This is especially common in older homes or if you’re using a power strip with multiple devices.
How to Check:
- Unplug the TV from its current outlet.
- Plug it into a different wall outlet, preferably in another room.
- Turn on the TV and check if the screen is still black.
What to Look For?
If the TV works in a different outlet, the original outlet may be faulty or unable to handle the TV’s power requirements.
Step 8: Check the Backlight
The backlight is crucial for displaying images on the screen.
If it’s malfunctioning, the TV might display a black screen while still producing sound.
How to Test:
- Turn on the TV and ensure it’s set to an active input.
- Shine a flashlight close to the screen.
- Look for faint images or movement on the screen.
What to Do If Backlight is Faulty?
If you see images with the flashlight, the backlight is the issue, and it may need to be replaced. Contact Onn support for repair options.
Step 9: Factory Reset Your Onn TV
If all else fails, a factory reset might be necessary.
This will erase all settings and return the TV to its original state.
How to Perform a Factory Reset:
- Find the reset button on the back or side of the TV. It’s usually a small pinhole labeled “Reset.”
- Use a paperclip or similar object to press and hold the button for 15 seconds.
- The TV will restart, and you’ll need to set it up again as if it were new.
Why This Works?
A factory reset can resolve deep-rooted software issues that other troubleshooting methods can’t fix.
Step 10: Contact Onn Support
If your TV is still showing a black screen after all these steps, it’s time to contact Onn support. They can provide advanced troubleshooting or send a technician to inspect the TV.
What to Have Ready:
- Your TV’s model number.
- Details of the issue and steps you’ve already tried.
- Your warranty information.
Final Tip: If your TV is under warranty, any repairs may be covered, potentially saving you from additional costs.
Final Thoughts
Onn TVs offer great value for money, but like any electronic device, they can experience issues.
By following this detailed guide, you can troubleshoot and fix the black screen problem yourself in most cases.
If the issue persists, Onn’s customer support is available to assist with more complex repairs.