While you wait for answers, we may have found some information which could help you.
Click here for Sony Charge ComputerSONY NV U53 How do you open it up?
Smashed my Sony NV- U53 sat nat screen, any idea where to purchase a new 1?
fatal application error?
cracked screen on sat nav?
Repair of my Sony NV-U53G Sat Nav?
touch screen on sony nvu53 has stopped responding?