I've bought an old 500GB Time Capsule on eBay with a hope of repairing it. The seller admits the PSU has gone (literally -- it's no longer present), so I'm hoping it might be as simple as swapping in a new PSU -- which I believe is a common problem. I'll also upgrade the disk to 2TB. Has anybody much experience of this kind of thing? For example I have an Apple TV that I don't use. Is it possible to swap-in the PSU from that?