My TT turns on but the screen is black. I opened my tomtom and found the flex ribbon that connects the screen to the "motherboard is loose and does not stay in the terminal on the motherboard. When I press on the ribbon, the screen turns on. There is a small clip with a tooth at each end. One tooth is cracked. I presume that is why the ribbon does not stay attached. How can I fix this or where can I get get a new flex ribbon clip. Who makes this part? Is there any other way to secure the ribbon?