How To Hide Wall Holes. I always used a fake wall block. I am happy to tell you that they are now history.
To repair smaller wall holes of several inches in both drywall and plaster without adding framing, try the repair process at this link.
How to hide the wires on a wall mounted tv. The kit even includes the hole saw attachment for your drill so you can make sure your holes are perfectly sized. It should be of adhesive nature so that there is no danger for it to come out of the fitting. You read a blog on how to hide tv cables and you get advice on creaking.