I have only been giving advice on FIXYA for a very short while but have noticed that an awful lot of the people who relate their product issues , particularly complain about faults developing after power cuts / outages. It is apparent, from a description of the complaints, that damage is being caused by outages that may be a result of power surges blowing electricity sub stations.
There are a lot of damaged audio devices / tvs being affected. As such I advise you TO BUY SURGE PROTECTORS for all you valuable devices.
I have them around the house and although we only get an occasional power cut here in the UK I know that at times they have saved my equipment fron power spikes. The small cost is justified in the long run.