I just purchased my first ever Atari 800XL. At first glance it appears to be in farily good condition. It comes with an original power supply. I know some other 8-bit computers (C64) have reputations for system killing power supplies. Do Atari supplies have any similiar issues? If so, do you know of any resources for testing the power supply? I've search online, but there seem to be fewer resources for the Atari XL systems compared to the Commodore. I'm waiting on a video cable since my system didn't come with one, but would like to validate the system as much as possible ahead of time.