Hi. I just bought a new toshiba satellite A210/A215 laptop two weeks ago. After about a week of use, something unusual started happening. After I had been using the laptop for awhile (sometimes a couple of minutes, sometimes several hours), the screen suddenly turns black with no warning. It is still on, because I can hear it running. I just can't see anything on the screen and any music or video playing stops. If anyone could help with this that would be great. Thanks!