This is just something I thought would be interesting to share. When my kids were just little ones, (oldest being 3 years old and baby was 6 months, now they're 15 and 12) we had a pretty decent stereo system. I'm sure you can guess hubby picked it out (boys and their toys!) and he was pretty proud of it. We'd had it for just over a year with no problems but one night, we were woken up in the middle of the night when the stereo started blaring full volume. We ran downstairs at double speed to find nothing out of order except the stereo blasting a CD as loud as it could possibly could go. We quickly shut it off so the neighbors wouldn't complain. Our oldest son, Ben, was still upstairs in his room as he didn't take the stairs on his own and our youngest, McKenzie, was confined safely in his crib.
The stereo was on a high shelf for the kid's safety and so hubby's precious equipment wouldn't end up with sticky fingers all over it. The rule was that the stereo must always have the volume turned down to zero before turning it down so the speakers wouldn't blow when it got turned on. We couldn't figure out what had happened and put it down to some oddity. Well, I did, hubby thought I had been careless. We left it at that and went back to bed.
The next night the same thing happened. We shut it off and tried to figure things out. We thought of the power bar but the TV, VCR and game systems were plugged into the same power bar, which had a surge protector. This means if there is a power surge, everything will shut down. And if the power bar was defective somehow, it should have caused everything plugged into it to come on too. I was getting a bit spooked but hubby said the receiver must be defective somehow and made an appointment to have it serviced. The girl who took our call was reluctant because she thought we were being silly but since the warranty had just barely run out, she made an appointment for about two days later.
Meanwhile it happened every night until we took it in. They had it almost a week so things were peaceful. They called for us to pick it up and said they couldn't find anything wrong even after double checking it. He said he changed some part inside because it was the only thing he could think to do and we should have no more problems. So he claimed.
Once again we were shocked out of sleep by a blasting stereo. We were both a little freaked out and we unplugged it. The next night loud music woke us again! When we checked again it was plugged back in.
Hubby was a little bit irate when he called back this time and she was a little quicker to get it looked at. The service department still claimed they couldn't find anything wrong but for the sake of keeping a good customer happy (it was a Sony as was all the rest of our electronics) they replaced it with a brand new stereo receiver, the next model up. We were quite satisfied with that.
After we got the new receiver we never had another problem. As a matter of fact, that stereo is still going strong. My kids use it on their TV for playing their game systems. I think we just had a bored music lover passing through. I hope he found a nice concert hall to take up residence in.