You're halfway through an episode, the screen drops to black, the white logo fades back in, and you land on the home screen like someone yanked the plug. Twenty minutes later it does it again. A Roku TV stuck in a reboot loop almost always traces to one of four things: power, heat, an HDMI handshake fight, or a software update that didn't finish cleanly. Work through these in order. The first fix clears it for most people.
Do a real cold boot, not just a restart
A menu restart doesn't drain the board. A cold boot does, and that alone resolves a surprising number of loops.
- Unplug the TV at the wall outlet. Not the power strip, the wall.
- With it unplugged, press and hold the physical power button on the TV (usually under the panel or on the back) for 20 to 30 seconds. That bleeds off residual charge.
- Leave it unplugged a full 60 seconds.
- Plug it back in and let it boot without touching the remote for two minutes.
If it comes up and stays up, you're done.
Plug it straight into the wall
Roku TVs draw a steady load, and a tired power strip or daisy-chained surge protector can sag just enough to trip a brownout reset. Move the TV's plug directly to a known-good wall outlet and test that outlet with something else first.
One important split here. If the thing rebooting is actually a Roku streaming stick or a Streambar plugged into the TV, the cause is almost always an underpowered USB port. Streaming sticks need their included wall adapter. The half-amp a TV USB port supplies isn't enough, and the stick brownouts and reboots under load. Pull the stick out of the TV USB, run it off the wall adapter, and the loop usually stops.
Give it room to breathe
Roku TVs throttle and then protectively shut down when they cook. TCL, onn, and Hisense Roku sets want at least 4 inches of clearance around every vent. If the TV sits in a tight media cabinet, on top of a cable box that runs warm, or in direct afternoon sun, heat builds until it cycles.
Pull it out from the wall, clear anything stacked on top, and feel the back panel after it's been on a while. If it's hot to the touch and the restarts cluster on warm afternoons or during long sessions, you've found it. Improve airflow and watch whether the pattern breaks.
Disconnect HDMI devices and turn off CEC
A misbehaving HDMI device can drag the TV into a power-cycle fight through CEC, the feature that lets one remote control everything. A receiver or console firing constant power and input commands can ping-pong the set into a reboot.
- Unplug every HDMI cable and any USB drives, then leave only the power connected.
- If the TV holds steady with nothing attached, reconnect devices one at a time over a few minutes to find the offender.
- To stop the command war without unplugging everything, go to Settings > System > Control other devices (CEC) and switch off both 1-touch play and System audio control.
Break a stuck update loop
Roku OS updates land in waves, and a download that applied badly can leave a TV restarting on the logo. A couple of OS 12.5 and 13.0 builds were known for this. If the set never reaches the home screen, force a clean software state:
- From a working home screen, go to Settings > System > System update and let it pull the latest build, which often replaces the corrupt one.
- If you can't reach the menu because it loops on the logo, hold the power button to fully power off, wait, and try one more cold boot before moving to a reset.
Factory reset when nothing sticks
A reset wipes accounts and settings, so treat it as the step before you call it hardware. Most Roku TVs have a recessed Reset button on the back. With the TV on (or looping), press and hold it for about 20 to 30 seconds until the status light blinks, then let the TV rebuild from scratch and sign back in. If you can reach the menu, Settings > System > Advanced system settings > Factory reset does the same thing.
When it's the power board, not you
If you've cold-booted, ruled out heat, stripped every HDMI device, updated, and reset, and the TV still cycles, the fault is usually internal. Failing capacitors on the power supply board are the classic cause: the restarts get worse as the set warms up, the standby light may flicker oddly, and sometimes you'll hear a faint tick on each reboot. On a budget TCL or onn set, a board replacement often costs close to a new TV, so weigh repair against replacement. If the set is still inside its one-year warranty, start a claim with the brand before paying anyone, because a power board failure is squarely their problem to fix.