Get out of Screen saver mode in roku

Try this

Roku tv screen is completely white

https://community.roku.com > td-p
Jan 6, 2021 - Navigate using the up and/or down buttons.. Go Settings > System > Power > System Restart and press the OK/Enter button on your remote.

..

Open the battery compartment and remove the batteries from the remote. Unplug the power from your Roku device and wait approximately 5 seconds, then reconnect the power cable. Once the Roku logo appears on the home screen, reinsert the batteries in the remote

Contact ROKU they should be able to sort it out for you.

I presume you have a box and not a stream stick.Try unplugging ROKU box.Many units have a button you have to push on remote after plugging in ROKU box,this connect Remote to ROKU box.If this doesn't work take out batteries in remote and put back in,this has to be done after you plug in ROKU box.Are batteries weak,try some new ones?

That is the screen saver. Hit the OK button and it should go back the the normal screen

Please set the input source of your TV to video since you're using Red Yellow and White cable. Or set it to AV

if you're only seeing white roku, it's on screen saver mode. if the remote didn't work, try to change the batteries and try again. you can also power cycle the roku unit by unplugging the power cord from the power outlet for 20 seconds.