Why Your Roku Won't Turn On Over WiFi (And How to Fix It).

One of the most common issues users face when setting up a remote control app like QuickRemote for Roku is trying to turn the TV on. The app connects perfectly when the device is running, but if the TV turns off, the app suddenly says "Device Not Found."

This is extremely frustrating, especially if you're trying to use your PC to stream music or turn on the news without leaving your desk.

The Culprit: Power Saving Mode

By default, when you turn off most Roku TVs (like TCL or Hisense models), they enter a "Deep Sleep" or standard power-saving mode. In this mode, the TV completely shuts down its internal WiFi chip to conserve electricity.

Because the WiFi chip is off, your Roku is completely invisible to your router, meaning QuickRemote and even the official Roku mobile app have no way of speaking to it to send a "Wake Up" command.

The Solution: Enable "Fast TV Start"

To fix this, you must tell your Roku to keep the WiFi chip active even when the screen is off. Roku calls this feature Fast TV Start.

How to enable Fast TV Start:

1. Turn on your Roku TV manually using the physical button or your hardware remote.
2. Press the Home button.
3. Navigate to Settings > System > Power.
4. Select Fast TV Start.
5. Check the box to Enable "Fast TV start".

Note: Enabling this feature will slightly increase the TV's idle power consumption, but it allows instant waking and often speeds up app load times.

Wake on LAN (WoL) limitations

Some standalone Roku streaming sticks do not support Fast TV Start since they draw power directly from the TV's USB port. If your stick loses power when the TV turns off, it simply cannot be turned back on via WiFi until the TV restores power to that USB port.