Built a PC inside of a briefcase for LAN gaming and remote PC support. The link below documents the process and parts. I have traveled on a plane with it without issues.
https://hackaday.io/project/4360-briefcase-pc
Was built awhile ago and I haven't updated it in awhile. Currently running linux on it and using it to stream.
Unable to add in the hardware section yet PSU --- Athena Power AP-MPS3ATX40 400W Micro --- http://www.newegg.com/Product/Product.aspx?Item=N82E16817338009 Accessories --- LITE-ON Slim 8X DVD Burner Model DS-8A2S-A01 --- http://www.newegg.com/Product/Product.aspx?Item=N82E16827106260 Keyboard --- Gyration Classic Compact Wireless Keyboard GYAM-CSKB-NA Mini Keyboard --- http://www.newegg.com/Product/Product.aspx?Item=N82E16823172028 Mouse --- Perixx MX-3000B Laser Sensor Mouse -- http://www.newegg.com/Product/Product.aspx?Item=9SIA2J20T19543