Onn Roku TV Black Screen With Sound? (Quick Fix)

If you are wondering what causes the Onn Roku TV black screen with sound? Well, continue reading!

If your Onn Roku TV’s screen goes black, but the audio is still there, it could often be caused by the input source, a blacklight problem, or potentially, a system issue.

We recommend the following steps in response to the problem:

There’s much more to dive into, so keep reading!

How to Fix the Onn Roku TV Black Screen With Sound?

Note: Have you verified that the TV responds to inputs on the remote?

1. Switch the Onn Roku TV Source

The first and easiest solution for a black screen on your Onn Roku TV whether it is with audio or not is to switch the input source.

An issue with the HDMI connection of a third-party device or a problem with the TV’s audio or video transmission module could cause the screen to go black.

Here are the instructions to pick a different input source for your TV:

1. Ensure the TV is turned on and plugged into the power.
2. Now, press “Home” to ensure the TV is on the homepage.
3. Press the star (*) button to access the TV’s Settings page.
4. Press the remote’s “Down” arrow 5 times and then “OK.”
5. Next, press the “Down” arrow 2–4 times and press “OK.”
6. Repeat these instructions until a viewable source is picked.

The source options in your Onn Roku TV’s input menu won’t change regardless of how many external devices there are.

There could be up to 3 HDMI inputs as well as an AV input, thus you can test each option even if the screen is black. 

2. Conduct a Remote Control Reset

The Onn Roku TV comes with the so-called “Remote Reset” feature, which consists of a button combination that must be pressed in chronological order. 

The best aspect of this feature is that it does not require the TV’s screen to be visible or for any application or tab to be launched.

To initiate a remote reset, press the following buttons in the following order:

• Press the “Home” button 5 times.
• Press the “UP” button once.
• Press the “Rewind” button 2 times.
• Press the “Fast Forward” button 2 times

Now, if your TV was playing audio, the playback should stop because a reboot is following up.

The TV should be usable in less than 60 seconds, and you will be able to determine if the black screen fault persists. 

3. Reset the Onn Roku TV’s Power Supply

The power cycle is another quick resolution for the Onn Roku TV black screen with sound problems.

The procedure involves stopping the TV’s electrical income for a continuous amount of time until all of the residue voltage has drained.  

Proceed with these solutions to power cycle the Onn Roku TV:

1. Press the “Power” button on the Onn Roku TV remote.
2. Once the audio stops, unplug the TV’s power adapter.
3. Next, wait for 60 seconds until the TV discharges fully.
4. Reconnect the TV’s power cable back into the outlet.
5. Check if the black screen fault persists and test the TV.

How to Check if Onn Roku TV Has Power Supply Issues?

Persistent rebooting, powering off, or of course, a black screen are solid indicators that something could be wrong with the power supply.

So, we recommend the following:

• Ensuring the TV’s power adapter is in good condition.
• Connecting the Roku TV to a different electrical outlet.
• Removing all third-party power equipment in the setup.

Note: Replace any of the equipment that has sustained visual damage or doesn’t work when tested on another device. 

4. Disconnect ALL Third-Party Devices

As established, faulty third-party devices might be the main influence for your Onn Roku TV’s black screen.

Respectively, the best solution is to temporarily disconnect all devices from your TV’s inputs and check if the performance will improve and the black screen issue will disappear.

Disconnect devices plugged over:

• HDMI / HDMI ARC
• Coaxial cables
• Component / RCA 

Note: The only cable that must remain plugged in while testing the TV is the power adapter!

5. Test the Onn Roku TV’s Backlight

The Onn Roku TV showing black screen may be due to a lasting defect with the backlight panel. 

The Onn TV’s screen consists of two things – an LCD panel consisting of pixels that illuminate mildly depending on what you are viewing and a backlight that shines through the pixels. 

• A fault with the backlight means that the pixels will not be illuminated enough for you to view.

5.1 How to Test the Onn TV Backlight?

Testing the backlight is simple. All you need is a bright flashlight (your smartphone’s) and a dark room.

So, eliminate all light sources in the room, ensure the TV is turned on, and shine your phone’s flashlight closely to the TV’s display surface.

Note: If the problem is caused by a backlight fault, you should see a picture on your TV of what you’re currently viewing only through the flashlight’s beam. 

5.2 How to Fix a Defective Backlight?

Backlight repair isn’t easy and often requires assistance from a professional.

We recommend reaching out to Onn if the TV is still under warranty or seeking a certified technician who can take a look and inform you of what’s wrong. 

6. Conduct a “Blind” Factory Reset

If you’re certain that the TV responds and only the screen is black, you can execute a factory reset without seeing anything.

The procedure should potentially address all underlying faults with the device, including the persistent black screen.

Press the following buttons on the remote to start a factory reset:

1. Press the “Home” button to ensure you’re on the homepage.
2. Press the “Down” arrow button 7 times and then press “OK.”
3. Press the “Down” arrow button 14 times and then press “OK.”
4. Press the “Down” arrow button 8 times and then press “OK.”
5. Press “OK,” then press the “Down” arrow, and then “OK” again.
6. Press the “Down” arrow 3 times and then the “Right” arrow once.
7. Press the “OK” button 4 times to input the “0000” reset combination.
8. Press “Down” once and then press “OK” to initiate the factory reset.

On newer Onn Roku TVs, the factory reset code is automatically generated upon entering the “Factory reset” tab.

If the TV has sustained a backlight failure, you can use your smartphone’s flashlight to shine under the keypad and see the randomly generated code for the factory reset.

Alert: Do not interact with the TV for 2–3 minutes after the factory reset starts!