That's really strange. Two different members posting a similar question at the same time. Perhaps the two of you were hit by the same storm.
Electronic devices do not like lightning strikes. It could have fried or shorted out any number of electronic components. Electricity follows the path of least resistance, which is why not all electronic devices will blow when your home suffers from a huge surge in power. In the end, normally a few devices with low resistance like TVs, because they're normally connected to a ground in the form of a cable connection, take the brunt force of the jolt. In this case, it looks like the XBOX was collateral damage, probably getting hit through a surge in the video connection from the TV.
You could investigate the boards of each TV as long as you want, but the fact remains that most TVs fried this way are not worth repairing. You'll likely need to replace all devices that were blown up. My best advice to you is to look at possible compenation from your homeowner's insurance, and see if they will cover the damage. It may be your best option for getting new stuff.
If your insurance won't cover it, you may be forced to foot this bill on your own. But, before you throw it all out, take all affected devices to a service center for an estimate. It's possible that some of your devices can be fixed cheaper than they can be replaced.
I wish I had better news, but when it comes to lightning, you only get good news if you don't get hit at all.