Hisense Roku TV Flickering On And Off? (Here’s the Fix!)

Hisense Roku TV flickering on and off could be frustrating, especially when you are trying to enjoy your favorite shows or movies.

The issue can occur from various things, including source problems, a faulty HDMI, or a defective backlight.

Here, you will discover expert solutions that have helped many users resolve the flickering on their own Hisense Roku TV, so let’s get started!

How to Fix When Hisense Roku TV Flickering On and Off?

Quick tip: Try gently tapping on the back panel of the TV, as there might be a loose connection inside–misaligned components could cause the TV’s display to flicker persistently.

1. Force Reboot the TV

We should start with something simple, such as “force” rebooting the TV, in case the problem is temporary.

There is a combination of keys on your remote control that, when pressed, cause the Hisense Roku TV to power off and cycle through the settings rapidly until it entirely powers off.

Input the following key combination on the remote:

• Press the “Home” button 5x times.
• Press the “Fast Forward” button 3x times.
• Press the “Rewind” button 2x times.
• Wait until the TV powers off and reboots.

In the meantime, verify that the TV’s power adapter is connected securely on both ends and turn off all external devices connected to the HDMI or Optical inputs. 

2. Change the Source/Broadcast

The persistent flickering of the Hisense Roku TV screen may be caused by an inbound problem with the broadcast or source you’re viewing. 

If You’re Viewing a Source:

1. Press the “Source” or “Input” button on the remote.
2. Select an alternative source from the on-screen tab:
3. “HDMI 1” / “HDMI 2” / “HDMI 3” / “AV” / “Live TV”.
4. Wait for several seconds to check for a display flick.

If You’re Viewing an App/Channel:

Use the remote control to access an alternative Roku channel installed on your TV and wait for 30–45 seconds to check if the screen flickering is still there.

Well, even if all of your TV’s input sources are empty, thus, there are no connected devices, you would still see the “No Signal” message.

Hence, try to determine if the no signal message flicks or disappears from the screen in those 30–45 seconds during which you’re testing for the issue.

Note: Flickering even on an empty source means that the problem is not from the input source!

3. Unplug All Connected HDMI Cables

Proceed with unplugging all HDMI cables connected to the Hisense Roku TV that belong to a third-party device.

Even if you haven’t selected the HDMI device’s input through the TV’s source menu, it could cause disruptions with the broadcast and result in this constant screen flickering. 

How to Identify a Faulty HDMI Cable?

The most common symptoms of a faulty HDMI include:

• Flickering of the picture as the one on your TV.
• Disruptions in the third-party device’s audio out.
• Reduced quality of the Hisense Roku TV picture.

Video disruptions and flickering are among the most common causes of a faulty HDMI cable or external device.

We recommend unplugging all of the devices and checking if the Hisense Roku TV would still flicker. 

4. Adjust the Roku Picture Settings

The picture settings of the Hisense Roku TV define the quality and performance of what’s on the display.

Hence, an incorrect adjustment of these settings could cause the TV’s display to go out prevalently while watching shows or movies through ANY source.

• To access Roku’s picture settings, press the “Star” button, then go to “Picture Settings” → “Customize Picture”.

Now, adjust the following options:

• Gamma correction: Set between 2.0 and 2.2.
• Noise reduction: Set to “Low” or “Medium”.
• Color temperature: Set to “Normal” or “Warm”.
• Color space: Adjust to 20% to 40% maximum.
• Local dimming: Adjust to 30% to 45% maximum.
• Action smoothing: Adjust to 10% to 25% maximum.
• LED action clarity: Adjust to 10% to 30% maximum.

Note: We recommend resetting the picture settings if you have an existing preset at “Picture Settings” → “Customize Picture” → “Reset Settings” → “Reset”.

5. Hard Reset the Hisense Roku TV

You can resolve the Hisense Roku TV screen flickering by performing a power circulation and draining the TV’s electrical supply.

That’s a standard solution for all underlying faults with the TV, as long as the power equipment is in good condition.

• Unplug the Hisense Roku TV’s power cable for 45–60 seconds to hard reset.

Pro Tip: Use the built-in “Power” button on the rear panel to turn on the TV and determine if the display flickering is still there.

6. Test the Hisense Roku Backlight

A potential fault with the backlight of the TV could result in persistent flickering.

There’s a simple way to check whether some of the backlight’s diodes are inconsistent or failing to illuminate by using the flashlight of your smartphone.

6.1 How to Test Hisense Roku Backlight?

To test the backlight, make the room pitch black by powering off all light sources and shining your smartphone’s flashlight directly at the TV’s screen.

Then, check the exact lightning pattern and determine if some of the LED strips are blinking or have gone off.

Now, look closely for faint movement or images on the screen. If the lightning is not consistent, it means that there’s a backlight failure. 

6.2 What to Do if the Backlight is Faulty?

A problem with the TV backlight can only be addressed by the TV’s manufacturers, but you can try lowering the TV’s brightness.

If that doesn’t help, try different picture settings (solution #3) and consider getting in touch with the manufacturer for more help.

Alert: The backlight problem could occur as a result of defective LED strips!

7. Identify Hisense TV Power Issues

A power supply insufficiency can cause the Hisense TV display to go on and off repeatedly or only at certain times.

Well, several segments define the stability of the TV’s power supply that must be inspected, so let’s walk you through them:

7.1 The Power Source

You should begin by testing the Hisense Roku TV power source by connecting another device and determining if the voltage is consistent.

The TV’s transformer is set to work at 120V-240V income A/C, which means the TV will power off or reboot if the outlet is bad. 

7.2 The Power Adapter

The Hisense Roku TV uses a standard 2-prong power adapter that wears out over time and may start causing issues.

First, ensure the cable is connected securely on both ends, and then check for damage on the connectors or the plastic cover. 

7.3 External Devices

Lastly, verify there are no external power devices present in the setup of your TV.

This includes connectors, smart plugs, switches, adapters, or anything that doesn’t belong to the equipment.

Note: If the Hisense Roku TV experiences other power insufficiency-related symptoms, we recommend getting in touch with the manufacturer!

8. Update Hisense Roku’s OS

Perhaps a firmware update should resolve issues with the TV’s format or video that’s causing the display to go blank periodically.

If you’re able to navigate the TV’s settings, then there’s a much simpler way to start the OS update without using a USB flash drive:

• Automatic update: Navigate to “Home” → “Settings” → “System” → “System Update” → “Apply”.
• Manual update: Download the most recent OS at Roku’s Download Center, unpack the RAR file on your USB flash drive, and then plug it into your Roku’s USB port. 

Note: Roku needs a consistent connection to the internet in order to apply firmware updates, so double-check the Wi-Fi’s strength.

9. Reset your Hisense to Defaults

If nothing helps and your Hisense Roku TV flickering on and off, then we can recommend a factory reset.

This will completely reinstall the Roku system and erase everything on your TV.

The Roku OS provides two options for a reset:

• A partial reset doesn’t erase sensitive information.
• A complete reset that erases all data on your TV.

We recommend a complete reset, as the flickering could be caused by an installed channel or corrupted data that won’t be targeted by the partial reset.

9.1 How to Factory Reset Hisense Via the Menu?

• Press the “Home” button on the remote, then navigate to “System” → “Advanced system settings” → “Factory reset” → “Factory reset everything”.

9.2 How to Factory Reset Hisense Via a Button?

• Locate the “Reset” button on the back of the Hisense Roku TV (near the inputs panel) and hold it for 10–15 seconds.

Regardless of the reset method, the Hisense Roku TV will power off and begin the factory reset, which should last for about 2–3 minutes. 

Note: If you’re concerned that your Hisense TV display is flickering because of a HW defect such as a backlight problem, try claiming your warranty.