A flickering picture from a Roku usually points at power, the HDMI link or a display setting. Roku's power article for players says that not enough power can cause odd behavior even when the light is on: a flashing red light or a low-power warning means you should plug the player directly into a wall outlet with the supplied cable and adaptor.
The checks in more detail
Overheating can also cause faults, and Roku's overheating article says a solid red light or an overheating message means unplug the device, let it cool and move it to open air. For the HDMI link, connect the player directly to the TV, remove any receiver or splitter, try another cable and port and reseat every plug, as Roku's black screen article advises; Roku's HDCP article explains that when devices in the HDMI chain do not all support copy protection, the picture can drop out or flicker.
Set Display type to Auto-detect and, if flicker appears only in HDR, turn HDR or Dolby Vision off under Advanced display settings. Try a lower resolution or refresh rate as a test. On a Roku TV, turn off Energy Saving or local dimming features to see whether brightness changes cause it, and check whether the on-screen Roku home screen flickers, which points at the TV. Restart and update the software with Check now.
If the flicker follows the cable, replace it; if it follows the TV, it needs service. Record a short slow-motion video of the flicker with your phone. A steady-rate flicker points at backlight dimming or refresh, and an irregular one points at the signal or cable, which narrows the fault quickly. Note whether the flicker happens with the room lights on or off and at what brightness. A flicker that only shows at low brightness points at backlight dimming rather than the signal.
Differential
Likely causes of “Roku TV line and players screen flickers, flashes or goes black intermittently”, and how to tell them apart
- 1
Insufficient power
What separates it The picture flickers with a flashing red light because the device lacks power
How to confirm Use the wall adaptor to power the player, and check the flicker again
- 2
Overheating
What separates it The picture flickers with a solid red light because the device is overheating
How to confirm Cool the device, move it to open air
- 3
A marginal HDMI link
What separates it The picture flickers on one input because the HDMI link is marginal
How to confirm Swap the cable and connect the player directly, without a receiver in between
- 4
An HDR mismatch
What separates it The picture flickers in HDR because of an HDR mismatch
How to confirm Turn HDR off as a test, and see whether the flicker stops
- 5
A TV fault
What separates it The home screen flickers on a Roku TV, which points to a fault in the TV
How to confirm Contact Roku or the maker of the TV, since flicker on the home screen points to a fault
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the home screen of the TV flickers as well
- The color of the status light on the player
- The cable and the port that you are using
- Whether HDR is switched on for the picture
Try in this order
0 of 7 completedCheck the light
ReversibleCheck the status light, since red means a problem with power or with heat, and then test again to see whether it helped.
Use the wall adaptor
ReversibleUse the wall adaptor and cool the device, moving it to a place with more airflow.
Connect directly
ReversibleConnect the player directly to the TV, with no receiver in between, and then test again to see whether it helped.
Swap cable and port
ReversibleSwap the cable and the port, to isolate which of them is causing the flicker.
Turn off HDR
ReversibleTurn off HDR to test, and see whether the flicker goes away, and then test again to see whether it helped.
Update and restart
ReversibleUpdate the software using Check now, and restart the device, then look again, and then test again to see whether it helped.
Contact Roku
ReversibleContact Roku if the TV flickers on its home screen, since that means a fault in the TV.
Model-specific
What is true of this model and not of its siblings
- Players
- Flicker on a player is often power or HDMI.
- Roku TV
- On a Roku TV, flicker on every input points at the TV.
- Other models this page answers
- These steps also fit models Roku Ultra 4800/4802, Streaming Stick 4K, Express 4K, Roku Express, Roku Streambar, Roku Streambar Pro, Roku Pro Series TV.
Stop boundary
When this stops being a self-service repair
- !If a Roku TV's home screen flickers on every input, contact Roku
- !If the fault follows the player, replace it
- !If it follows the cable, replace the cable
Evidence ledger
Sources behind this answer
Status light meanings and power sources.
Overheating.
Connections, input and power.
HDCP link issues.
The company and its products.
Exact questions
Common questions
Why does my Roku picture flicker?+
Power, heat or the HDMI link.
Can overheating cause it?+
Yes, overheating can cause flicker, so let the device cool down.
Can a receiver cause flicker?+
Yes, a receiver can cause flicker, so connect the player directly to the TV.
How do I tell TV from player?+
See whether the home screen flickers.
Should I lower the resolution?+
Lower the resolution as a test, to see whether the flicker stops.