I have no control to change it to tv - Sylvania 6620LCT 20 in. EDTV-Ready LCD Television

I'd unplug/disconnect the Roku and after 30 seconds try the control button on the back. If you can change the input do so, then plug the Roku back in. Until you use the input button on the back to change input to Roku, you should be able to use the other buttons on the back to control the TV. If this does not work, unplug both the TV and the Roku. Wait maybe a minute, then plug the TV back in and follow the above instructions. Here are other alternatives: Using physical buttons: You can find the physical buttons on the left or right back side of the Hitachi TV. Using these keys, you can change the input, adjust the volume, or turn on Hitachi TV without a remote. Press the Input button located at the back or side of the Hitachi TV. The list of connected sources will appear on the TV screen12.

Using external devices: Connect a wireless keyboard or mouse to your Hitachi TV and change the input1.

Buy a universal remote: You can buy a universal remote to control your Hitachi TV and change the source.

If the TV displays the menu or Smart Hub when you press the button on the remote - the TV is on, it's just displaying a black screen. Change the Source on the TV to another input. See the page on Samsung TV has No Picture for more troubleshooting steps.

Depending on the TV, there will be a Jog Controller or TV Control Stick that will allow you to access the TV menu and change the source. Use the control on the TV to select an option - toggle it left or right to see if anything appears on the TV.
If the control menu appears on the screen, the TV is on but not displaying any input. Check the connections or change the input source on the TV. If the controller button works on the TV, but not the remote, check the batteries in the remote control.

Unplug the TV from the power source and leave it for a minute or two. Reconnect the power cable directly to the wall rather than a surge protector. If the TV Standby light appears - the TV is receiving power. If the Standby light still doesn't appear, please get in touch to organise a service.

Some remotes might fail to make changes properly or cause incorrect operation if a button "jams" in a pressed position, and doesn't release; or the filaments inside the remote become dirty or damaged (sometimes from spills). Ideally check with a different identical remote with the batteries removed on your original so it can't interact with the TV. Also check if your TV has control buttons at the TV to test the tv and hdmi change settings. (Do those checks with batteries removed from remote). If changes at the TV controls work properly most likely the problem is with the remote control.

Hi Thor!
You have to select "Cable" on the universal remote on the cable to change the channels on the cable box.
And press "TV" on that remote to change or access TV Functions.
Or use only the TV remote only to change Inputs on the TV.
Good Luck,
JP

You need to try a different code,505,506,516,523,526,566,573,612,627,647,652,653,654,655,656,658,659,664,665,667,669,670,679,680,704,717,730,738.....hope this was helpful....

I would suggest you try to find a universal remote that has an "input" or "source" button and program that one to your tv. By pressing the "source" or "input" button, it will change the input to the tv. I hope this helps! -Der Strom

Turned power saving feature on the TV to low and moved the receiver about four feet away from the TV and the remotes work fine now.

Was it working before?  Is it possible you selected the wrong brand of TV when programming the remote?  Do you use a cable box or satellite dish with your TV (in other words, do you change channels by changing the channel on the TV, or on the digital box connected to your TV)?

some tv do that changing the channels.

in the control panels in the tv where r the buttons for change channel there must be video button, push it and there you go.

Good Luck

Feed cable signal directly to tv(no BOX) activate auto-program for channel memory.