A Roku that won't power on is almost always a power delivery problem — not a hardware failure. Work through these fixes in order before assuming the device is dead.

Quick Answer

Streaming Stick models: move to a different HDMI port and use the wall-plug power adapter (not USB from the TV)
Roku TV: hold the physical power button 15 seconds, then unplug for 30 seconds
Roku box (Express, Ultra): swap the power cable first — the included adapters fail more often than the device
If no status light appears at all: the power adapter is the prime suspect

Symptoms

No indicator light on the device
Black screen with "No Signal" on the TV
Powers on briefly then shuts off immediately
Remote unresponsive and Roku app can't connect
Status light blinks but TV stays black

Quick Checks

Verify the HDMI port is active — switch inputs on your TV to confirm the source is selected
Check the USB power source — Roku Streaming Sticks need 900mA minimum; TV USB ports often deliver too little current
Inspect the power cable — look for any bend, kink, or fraying near the connector
Try a different wall outlet — rule out a dead outlet or overloaded strip

Step-by-Step Fixes

Fix 1: Use a Dedicated Wall Adapter (Streaming Sticks)

The most common cause of a Roku Streaming Stick not powering on is insufficient USB power from the TV.

Disconnect the Stick from the TV's USB port
Connect the included USB-to-power-adapter to a wall outlet
Plug the power cable into the Streaming Stick
Switch the TV to that HDMI input

Roku Streaming Sticks require a stable 5V/900mA supply. Most TV USB ports can't guarantee this.

Fix 2: Power Cycle (All Models)

Unplug the Roku from its power source
Disconnect the HDMI cable from the TV
Wait 30 seconds (capacitors need time to fully discharge)
Reconnect HDMI first, then power
Wait 60 seconds for the boot sequence to complete

Fix 3: Replace the Power Adapter

Roku's included power adapters have a high failure rate. If you have another 5V/1A or 5V/2A USB adapter:

Swap out the adapter entirely
Use the original cable if possible (cable quality matters)
Avoid third-party cables under 3 feet — resistance causes voltage drops

Fix 4: Factory Reset Without Remote

If the Roku powers on but won't display anything or respond:

Roku streaming players (box):

Find the physical reset button (recessed pinhole on the back or bottom)
Hold it with a paperclip for 10 seconds until the status light blinks rapidly
Release and wait 2 minutes for the reset to complete

Roku Streaming Stick:

The reset pinhole is on the side or back of the device — not on the remote
Hold 10 seconds while the device is powered

Fix 5: Check HDMI Port and Cable

Try a different HDMI port on the TV (ports 1 and 3 are most reliable on most TVs)
Try a different HDMI cable if you have one — damaged cables can prevent handshake
Clean the HDMI port with compressed air if there's visible debris

Fix 6: Re-pair the Remote

If the device powers on but the remote is unresponsive:

Remove the batteries from the remote for 30 seconds
Hold the pairing button (inside the battery compartment) for 3 seconds
Reinsert batteries and hold the pairing button 5 seconds until the light flashes
The Roku should detect the remote within 30 seconds

If Nothing Works

Under 2 years old: Roku devices have a limited warranty — contact Roku support and request a replacement
Roku TV: contact the TV manufacturer (TCL, Hisense, etc.) since Roku OS runs on their hardware
Streaming Stick more than 3 years old: replacement is usually more cost-effective than repair — current Streaming Stick 4K models support 4K HDR and Dolby Vision

Why does my Roku have no light at all? No indicator light almost always means no power is reaching the device. Check the wall outlet, swap the power adapter, and if it's a Streaming Stick, move it from the TV USB port to a dedicated wall adapter.

Why does my Roku turn on then immediately turn off? This is usually a power supply issue where the adapter can't sustain enough current during boot. The boot sequence draws more power than idle state. Swap the power adapter for a higher-rated one (5V/2A or better).

Can a bad HDMI cable stop Roku from turning on? A bad HDMI cable won't prevent the device from powering on (you'll still see the status light), but it can cause a black screen. If the status light is on but the TV shows "No Signal," the HDMI cable or port is the likely culprit.

How do I know if my Roku is on but not showing on the TV? Open the Roku mobile app (iOS or Android) on the same Wi-Fi network. If the app detects your Roku, the device is on but the HDMI connection to the TV is failing.

My Roku shows the logo then goes black — what's wrong? This usually means a software crash during boot. Perform a factory reset using the pinhole button (hold 10 seconds). If the problem persists after reset, contact Roku support for a replacement.

Roku Not Turning On: 6 Fixes That Actually Work