Quote Originally Posted by pcmcia View Post
How do you go to preboot. All i see is white screen
Put finger on uper left corner and hold

with other hand push button to ON position and hold

After 2 second release hand from ON button but still press uper left corner of screen

updater.exe will now see your nuvi and you can flash

p.s.
If no preboot,try to release ON button after 1 second or after 3 second