(Vizio M220VA) Vizio TV has display issues

This has gone on for ~8 months and the TV has held up so far, but I’ve always had some concern this could be a sign there’s a more serious defect with the TV. I have attached 3 photos of the problem because the issue is hard to show on camera. Take your pick on which one shows the problem the best. In case the photos are useless, the problem with this TV is the top bar on most applications (when used as a PC monitor) have inconsistencies and a unstable picture. In addition, the TV sometimes creates shadows on bold text in Word.

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Anyway, this issue happens at random and is in no way predictable as to when it happens. It just doesn’t happen all the time but when it does it has a bad habit of persisting. My HDMI cable is fine (1.4 spec) and displays an image, so I don’t think the cable is at fault but I do have a few extras on hand just in case. I don’t think the cable is bad, since a faulty cable would trigger no display and HDCP errors and I not seeing either of these faults to indicate the cable is bad.

What would cause such a fault in the TV? Personally I’m leaning more towards the display controller board more so then the cables or input/processing board, since the fault is not consistent.

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