tom123c,

In the interest of making sure you're happy with your purchase, I might recommend sending it in anyway. If you had problems with it, let the service center do the necessary testing and replacements (if necessary) for anything that isn't up to par.

It could be the electrical wiring, but if that's something you suspect, I'd definitely recommend considering a power-regulator for the appliances that you value most. You want to keep that power as consistent as possible, and varying degrees of voltage and amps could very well take a toll on your electronics' power supply over time; operational or not.

Normally I wouldn't suggest that, but there are some cases where I think it's a good idea to think about it.

--HDTech