Umm, I've just checked mine, I have 5 amp fuse. Maybe you're right.. you could always change it i suppose? But then again, there's probably other safety features within the Tv itself..
Hi,
You should be okay to just use standard plaster.
As you said, clean it up first. Because of the type of wall.. I would mix PVA glue with water (about 5 parts water to 1 part glue). Mix well and then 'paint' this onto the bits you'll be plastering. This will make sure the concrete doesn't...