Roku not working on Samsung smart TV, saying it needs to be powered on

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Streamer317 wrote:

Do you have the Roku plugged into your TV USB power? If so it needs to be plugged directly into the wall outlet. 

https://support.roku.com/article/217787747 

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This is not the universal solution one would think.  It depends on the TV and its USB port(s) - some will work fine.  Plugging into house power does eliminate this as a variable.

There are a couple of potential issues with powering your Roku via a TV's USB port, depending on your TV:

• Inadequate Power
  
  The ports on many televisions only supply 0.5 amp or less, which is not enough to power a Roku reliably.  It may appear to start up okay, but when it runs into something that requires more power than the TV's USB port can provide, something's got to give. Frequently this results in shutting down the stream you are viewing and exiting back to the Roku home screen.
  
  If this is a new problem, possibly an update to either the Roku operating software or to some channel app software is using a little more power than in the past, triggering this problem with a USB port that was just barely providing enough power before.
  
  The USB port(s) on your TV may be marked with the amps they provide.  (I have a Samsung with two ports, one marked 0.5 amps and the other marked 1.0 amp.)  For most Roku models 1 amp is probably the minimum acceptable (although some recent models do come with 1.5 amp adapters) -- higher is okay as the Roku will only draw what it needs.
  
  Powering via a USB power adapter plugged into house power can eliminate this as a potential issue.
  
  
• Intermittent Power
  
  The USB ports on some TVs remain powered when the TV is turned off, but many TVs USB ports power down when the TV is off.  When connected to a powered down port, the Roku must boot up each time the TV is turned on.  For many TVs this just means you have to wait for the Roku to finish its start up and arrive at the Roku home screen before you can use it. But in some cases a TV with a fast start option may start up and check its HDMI ports before the Roku is ready to respond, resulting in a "No Signal" (or something similar depending on the TV) notice from the TV until something causes the TV to check the port again. 
  
  Unplugging/replugging the Roku's power should trigger a new HDMI check by the TV and restore access. On many TVs, switching to a different input and back may force a new HDMI port check as well.  Also, on some sets it may be a configurable option whether the USB port powers down with the TV, or the TV may have multiple ports, one of which remains powered.

So on some TVs, powering your Roku via house power may solve a problem or two.  It is certainly something to try as a troubleshooting step when faced with the symptoms described above, but to say you MUST do this in all cases is an overstatement. 

It was plugged into the TV, do you know if plugging into a power strip works or does it need to be in the actual wall? 

My Samsung TV usually displays “no signal” or similar, when I first select the Roku input as well.  (Really any brand of TV should do this.)  However, I expect that, since I leave my Roku set to the default of going to sleep after a period of inactivity.  So, I just press the home key on the Roku remote to wake it up and continue.   If that’s a bother, you can turn off the automatic power saving on the Roku – a Roku at idle doesn’t use much power anyway, but I’m willing to press a button to save a watt or two.

Back to the Extreme 4k+

I have two, plus a stick 4k+  The stick has been problem free.  But both Extremes have had remote issues. 

One repeatedly kept telling me I needed to re-sync the remote to the TV.  I have never had that issue in 10+ years of Roku.  And when synced, it would power on the later model Samsung Smart TV but not the Roku!?! I turned off the energy saving auto-off feature and now the Roku comes up when the TV powers on.  But that means the Roku is actually still tuned to the streaming channel and pulling bandwidth, I imagine....

The second Extreme has not been able to power on the second Samsung Smart TV.  The syncing configuration recognizes I have a Samsung, and I can hear audio, right away.  But the syncing asks to continue, each time asking if the audio is still heard. That continues until it eventually ends without completing properly.  I have no control over the TV.  So very 20th Century with two remotes.

Other than performance of loading apps, the old HD only stick that this second Extreme replaced behaved fine.  I just wanted to have control over the TV with one remote.  The Extreme has failed me in that regard.  I may have to move my 4k+ stick to see if it is more successful.  I fear that I will just have the same behavior with the Extreme on the third TV, as it is not Samsung but a lesser brand.