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You mentioned ".....ok on cable". So what is it that's appearing in 1/4 size via HDMI on the TV please?
Please re-read what I posted.
What device are you trying to watch on the TV where the picture is 1/4 size?
Are you able to actually see my replies???
Yes i did. Then you said "normal picture" and before that had said "ok on cable". To me that sounds like you said the cable was working fine. Now you're saying the cable is what is appearing on 1/4 screen- is that correct?
If that's so, then you simply need to reboot your cable box.