Hedge hog4 issues

HI All I have a hedgehog 4 and I have a recurring problem often time when it ships the touch screen will not come on. I found this can be fixed by resetting the cards and connectors that feed the touch screen looking for a more permanent solution. Also last week one of my show techs did this, when he powered the console up the screen just scrolled what he said looked like code. I have been unable to replicate this in the shop. was wondering if anyone has encountered this.