Hello, Weird problem, swapped out the copen stereo for a Sony head unit about 6 months ago, works fine but every now and then, like once a month, it seems to go back to factory defaults and loose all the presets. I have had this in the past when the power leads arent connected right but that would make it reset every time the ignition is off, this only happens now and then. It's like the battery is being drained or cant cope sometimes and stops supplying power to the stereo just long enough to reset the stereo. Any ideas? Thanks, Andy.