Thank you both for the replies.
@RokuMary-F
1. The USB cable is plugged in to a Roku adapter model ADS-6RA-06 which I have from another Roku Express player and then into the mains as the TV doesn't have a USB port.
2. No. I don't have another TV.
3. Yes. I tried all these steps with no avail.
That what is strange to me is the HDMI cable goes only the half way in to the Roku device. Is this normal for that model 3930X or the device is defective? I'm attaching a photo to see it. This is the maximum the HDMI cable can be inserted. When I try to insert the HDMI cable more into the device the TV screen goes black-green but nothing more.
atc98092
TV manual says that is Full HD 1080p. When I select the HDMI port connected to the Roku device then it shows 720p on the screen. Also TV manual says that HDMI ports are type A.
It seems to me that:
a) TV is a too old model and is incompatible with that Roku device and I have to look for a newer model TV.
b) TV works on freesat but some other functions like HDMI and PC particularly which I tried to connect it to other devices with no avail are faulty by some reason.
c) There is nothing wrong with the TV but the Roku device is faulty by some reason. Especially, the HDMI port of it looks strange to me as the HDMI cable can be inserted only the half way.![]()