Odd thing but, have you checked the HDMI cable? People usually tend to forget those can go bad as well ;p Nvm, Both AV and HDMI does it. Maybe a bad connection under the HANA? Also, I'd recommend reballing the chips, lasts longer then a reflow. Especially since it's an XDK.
Not again D: yeah that is normally pre e74 :/ which is a bad connection under either the gpu or hana chip. Once this is all fixed though you need to find a better cooling solution for it :l
