I've LIBREelec installed on Raspberry Pi 3. I'm using HDMI to a "HDMI ready" TV. It was "OKay" by default, but the edges of the menus were off the screen (top, bottom, left and right).
The TV native resolution is actually 1366x768, so I thought it wise to select 1360x768 as my resolution. Now the top/bottom and right edges are exactly on the borders of the screen, as I would expect, but the image is about 1 inch in from the left hand edge of the screen. I have tried the calibration options. When I move the image left, the left edge of the image disappears (as if it had gone beyond the left edge of the screen).
I did try 1080, but the display looked horrible, as if the odd and even lines were reversed. Unfortunately, I can't remember what the original resolution was.
Any ideas what might be the matter, please?