iPod Touch Gen 4 Display - Brief Success
Smashed Display Glass and eventually almost no Touch sensitivity.
The guide was excellent - I certainly would not have attempted the repair without seeing the guide first. Like any job having the right tools make a huge difference and in this case having a an adjustable work vise or two would have been really helpful.
Bottom line is the display worked for about two minutes after I first got it installed, but by the time I had finished completely fitting it back together without any adhesive and after several attempts, the display has not worked at all since. I am also not getting any audio feedback which I was getting before. iTunes recognizes it and seems to think there is nothing wrong with the device but the display and now all the buttons seem to be dead, dead ,dead.
I suspect either a connector or the thin cable somehow got damaged in the process.
All-in-all, I figured going into this repair that it was a fairly high-risk gamble, so i am not overly surprised I was not successful.
I did not pick up on the significance of the ribbon cable placement which was mentioned at the end of the guide. It needed to be specifically formed into the "Z" shape to avoid damage from screen pressure. And it is not correctly pre-formed as shipped. I think this would be worth noting more aggressively in the guide. I suspect the cable was damaged by the sharp metal "frame" around the battery. The other thing that I think may have happened is that the connector got damaged although they look to be pretty robust in their design.