When you're covering a sporting event in the 1980s, overseas, then the technology wasn't as advanced as it was today, and therefore, possibly not as reliable. I've mentioned in this thread the 1988 US Masters golf, when coverage was lost for a couple of minutes, AFTER we had seen Sandy Lyle win.
Well, I seem to recall in 1986, the football world cup final that year was beset early on with losses of pictures and sound on the BBC, although one breakdown was just pictures, but retained sound. During the loss of pictures, we had a photo of the stadium, and reading "World Cup Grandstand, temporary fault"
Coverage of the final was being hosted from London, and not in Mexico.
The 1986 World Cup was notorious, the first few days were a complete technical disaster all over the world, Brazil and Canada were unable to see their opening matches - http://carousel.royalwebhosting.net/itv/WorldCup86.html
As that site mentions, ITV's first live match, Brazil vs Spain, was affected, as they couldn't get any commentary from Mexico and eventually Brian Moore and Brian Clough had to take over from London. In fact ITV had some standby commentators, including Clive Tyldesley, then still on Radio City, but presumably they decided that for their first match they should use Moore and not some bloke from local radio who'd never been on TV before. Tyldesley still did a commentary anyway, and was relieved they didn't use it as he failed to notice a goal has been disallowed and spent the rest of the match giving out the wrong score.
As well as that Masters breakdown, I've got a TV Times from 1982 when Steve Rider, then at ITV of course, talks about covering the US Masters for ITV earlier that year - they had the rights in those days - and he said they lost pictures and sound from the course about five minutes before the end, and never got it back. Apparently it was the fault of US TV, though, not ITV.