Yeah, sometimes that shielding can contact the chip real easy. I don't know about the V4 but on my V9s if you look at the shielding one corner is not level (meaning when you run the screw down it pulls the shield lower than the other side does). I put a few nylon washers underneath it to level it out and it prevented it from pressing down on the chip.
During the troubleshooting process I would power it up with the system "breadboarded" to see at what point the chip stopped working. I wouldn't suggest this unless you understand how to insulate the power supply and other parts though because you could fry the console or electrocute yourself if you are not careful. You might be able to duplicate the process by just loosening the screws and see if it works. Also you could try putting some electrical tape on the shield where it goes over the chip. If it works pull the shield off and look at the tape to see if there are indentions in it from the chip. If so you might want to try the washer trick I mentioned.
The First Amendment only survives because the Second Amendment is watching over it.