I use my TV for my computer and Xbox. Today I was downloading the expansion for Battlefield 3. It's a 2gb download so I decided to switch and surf around. What I didn't notice is that as soon as I change input type or pull out the HDMI of my Xbox (just the HDMI) it auto resets. So when I pull it back in, my Xbox automatically starts up again. And it didn't download the whole time I was being on my computer, even though it is turned on.
Is this something normal or is this an option for safety that can be disabled?
Best Answer
Do you have the other AV cable (the one that has Component and Optical outputs) plugged in as well? This guy was having a similar problem to you, and it turned out that the Xbox was switching output modes:
If it's not that, it might be a feature of your TV called CEC that you can probably disable:
Each TV vendor calls this something different in their options, but the Wikipedia article I linked contains some popular brands and what they call their version of this feature:
Just in case you can't figure out why it's turning off, there's an option in the Xbox 360 preferences where you can specify if you want the console to stay on and continue a download even if you power it off. In situations where you just want it on so that you can grab a big item off of the Microsoft servers, you can just set up the preferences properly, and then it will finish downloading regardless of whether or not you turn it off after you start the download.
Possibly related:
How can I turn off my TV without turning off my PS3?