- TVs
- Smart TV
Insufficient power
Roku Insufficient power on player: flashing red light
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
A flashing red light or a “low power” or “insufficient power” message means your Roku player is not getting enough current, usually from the TV's USB port. Use the original Roku USB cable with its power adapter plugged into a wall outlet.
Safety first
Stop and check this first
- Use only USB adapters rated at least 5 V and 1 A and in good condition; if one gets hot or has a damaged cable, stop using it and do not open it.
- If the red light is solid rather than flashing, it is heat, not power: unplug the player and let it cool down.
Safe checks you can perform
- Unplug the player for 10 seconds
- Go back to the original USB cable and try another port
- Power the Roku from a wall outlet
Leave these tasks to a qualified professional
- Do not attempt this professional task: Roku support case if it persists on wall power
- Do not attempt this professional task: Warranty repair or replacement
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Roku support case if it persists on wall power
What they doWhen the warning continues with the original cable, a suitable adapter and a wall outlet, Roku support assesses whether the player or its USB port is damaged.
They must show youthat the case records the cable, adapter and outlet used in the test.
In writingthe case number, the player model and serial number and the diagnosis.
Warranty repair or replacement
What they doIf Roku confirms a hardware defect within the warranty period, it repairs the player or replaces it with a new or rebuilt unit.
They must show youthe warranty check with the purchase date.
In writingwhether the unit supplied is new or rebuilt and its warranty.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Unplug the player for 10 seconds
- Who:
- you.
- How:
- disconnect the player from power, wait 10 seconds and plug it back in. Roku says this sometimes resets the device's power draw.
- Result that matters:
- the red light stops flashing and the warning does not return.
- If it clears and stays clear over the next days:
- nothing more is needed.
- If the flashing or the warning returns:
- check the USB cable and port.
- Evidence to keep:
- the time the warning appears and what you were watching.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
Go back to the original USB cable and try another port
- Who:
- you.
- How:
- use the USB cable that came with your Roku; if you swapped it, switch back. If the TV has several USB ports, move the cable to a different one, since Roku explains that not all of them deliver the same power.
- Result that matters:
- knowing whether the problem sat in the cable or in one particular TV port.
- If the original cable or another port fixes it:
- keep that combination and mark the working port.
- If it still fails on every port:
- move to wall power.
- Evidence to keep:
- which cable and USB port you used before and after.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
Power the Roku from a wall outlet
- Who:
- you.
- How:
- connect the player's USB cable to its USB power adapter and plug it into a wall outlet instead of the TV's USB port. Without an adapter, use one rated 5 V and 1 A or equivalent, and avoid long USB extension cables.
- Result that matters:
- a steady supply that does not depend on the TV's USB; the Roku also stays on with the TV off and boots faster.
- If on wall power it no longer warns:
- the TV's USB port was short of power.
- If the warning continues even on wall power:
- contact Roku support.
- Evidence to keep:
- a photo of the adapter label showing its output voltage and current.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- TVs
- Brand
- Roku
- Product type
- Smart TV
Known code variants
- batería baja
- energía insuficiente
- Insufficient power
- Low power
- Roku flashing red light
- Roku insufficient power message
- Roku low power warning
- Roku luz roja parpadea
- Roku luz roja parpadeante
- Roku red light blinking
What it means
Roku's low power guide explains that the Streaming Stick, Stick Plus, Stick 4K and Express can run from the TV's USB port, but that port sometimes does not supply enough power; the player may then act strangely, crash or warn you with a flashing red light or an on-screen message. A solid red light is different: Roku treats it as overheating. Other models may differ, and the warning alone does not prove that the player or its port is damaged; Roku only raises that if it continues on wall power.
Warnings and stop conditions
- Mediumeditorial warning
Use only USB adapters rated at least 5 V and 1 A and in good condition; if one gets hot or has a damaged cable, stop using it and do not open it.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
- Loweditorial warning
If the red light is solid rather than flashing, it is heat, not power: unplug the player and let it cool down.
Evidence: What to do if the red light is on or you see a “Your device is overheating” message · What to do if the red light is flashing, or you see a "low-power" warning
Symptoms and causes
Probable causes · in order
- TV USB port that supplies too little powerCommon
Roku notes that some TV USB ports provide more power than others and that older USB 2.0 ports may struggle to run the player reliably.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
- USB cable other than the one supplied with the RokuCommon
Some cables cannot carry enough current; Roku asks you to switch back to the original cable if you changed it, since that alone causes the warning.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
- Wall adapter rated below 5 V and 1 APossible
If the player came without an adapter or you lost it, Roku requires one rated 5 volts and 1 amp or equivalent; a weaker one often causes problems.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
- Long or low quality USB extension cablePossible
Roku advises against long, low quality USB extension cables because the voltage drops too much over the distance to the player.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
- Damaged player or USB portLess common
Only when the warning keeps returning on wall power does Roku suggest that the device or its USB port might be damaged.
Evidence: What to do if the red light is flashing, or you see a "low-power" warning
Virtual technician
Does Insufficient power still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
What to do if the red light is on or you see a “Your device is overheating” message
Roku · 2026 · official_doc
- 2
What to do if the red light is flashing, or you see a "low-power" warning
Roku · 2026 · official_doc
- 3
Qué hacer si la luz roja parpadea o si aparece una advertencia de “batería baja”
Roku · 2026 · official_doc
- 4
Where can I find the Roku limited warranty?
Roku · 2026 · official_doc
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