I have a garmin nuvi 255w and its locked and need a pin code witch i dont have to unlock it.
I had for 2 years a nuvi 255w and its as working real good. Until one day i tried to open it up and it ask me a code pin. Witch i dont have. Ive been the only one owner on that GPS and never put any pin code on it and now just like that it want one... Grrrr that **** me off i cant use it anymore i dont have any acess anywhere exept that pin code of 4 number,. Is this possibility of update? I dont know I am the only one in that situation?
Question: How do I unlock my device if I have forgotten the PIN number?
From Garmin.com -->
Answer:
If you have a Garmin Lock on your nuvi, zumo or StreetPilot c500 series and you have forgotten your 4 digit PIN number you can unlock the device by returning to your Security Location. The Security Location is the location that you set when you first enabled the Garmin Lock on your device. Returning to the Security Location will unlock your device.
If you have forgotten your PIN and Security Location please contact Product Support for assistance. Please note we will require a copy of the receipt and there will be a charge to unlock the device as this issue is not covered by the warranty.
To contact Product Support in your area go to http://www.garmin.com/garmin/cms/site/us/support/supportcontact
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Last modified on: 12/23/2009
Plain and simple answer: Can't.
Detailed answer: this is a security system feature which cannot be bypassed. The only way to get around the password feature is to send it in to Garmin, with the original receipt from an authorized dealer, and they will unlock it for you.
SOURCE: Garmin nuvi® 255W Car GPS Receiver. Problem: Reboots during Map
The simple way is to send the unit to Garmin they will load the maps for free.
If you keep trying - try this -
With your thumb in the lower right corner of the screen - pushing in - like there is an X there - [ push with your thumb before you turn it on] Turn it on -
when this screen comes up - push YES -
then try your maps.
If they do not load on your pc [ which must have the unit hooked up and a legit copy of the newest maps ] then send the unit to Garmin. They will load your maps for you FREE. 
SOURCE: nuvi® 255W Car GPS Receiver: The screen of my Garmin nuvi 255w GPS is white and...
Press and hold the lower right corner - then see second picture 
SOURCE: nuvi® 255W Car GPS Receiver: Can I get a owners manual for the Garmin nuvi 255W...
Hello.
You can find the garmin manual here.
Just type in your unit details.
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