How do you reset the clock on the TOMTOM One?

Look real close for a small hole that might be a reset hole. If so open a paperclip and gently push the reset. You should be able to feel it depress.

1. Turn on the TomTom unit. 2. Tap the screen to bring up the menu. 3. Tap the "Change Preferences" icon 4. Keep hitting the arrow to go to the next page. Clock setting is on page 6 of the preferences dialog. 5. If the Set Clock option is greyed out, you will need to perform a system reset and then perform these steps over again.
To reset the system, start with the power off. Then, hold down the power button for about 15 seconds, until you see the TomTom logo appear on the display. When the logo appears, release the power button. After this reset, you should be able to turn the unit back on and proceed with your setup from scratch.

If your device is not starting up properly, follow the steps below:
soft reset:

How to soft-reset my navigation device Answer In rare cases, your TomTom device may not start correctly or may stop responding. If this happens, try resetting your device. The only information lost on your device is the clock’s time zone setting.

How to soft-reset my navigation device Answer In rare cases, your TomTom device may not start correctly or may stop responding. If this happens, try resetting your device. The only information lost on your device is the clock’s time zone setting.


To reset your TomTom device, do the following:
Check that the battery is charged properly.
Charge your device for at least 2 hours before trying to turn it on again. Make sure the charging light on your device is on.
Reset your device.
Press and hold the On/Off button until your device restarts. This can take more than fifteen seconds.
In rare cases, your TomTom device may not start correctly or may stop responding. If this happens, try resetting your device. The only information lost on your device is the clock’s time zone setting.
In rare cases, your TomTom device may not start correctly or may stop responding. If this happens, try resetting your device. The only information lost on your device is the clock’s time zone setting.

n rare cases, your TomTom device may not start correctly or may stop responding. If this happens, try resetting your device. The only information lost on your device is the clock’s time zone setting. Select your device from the list below to see how to reset it.


Select your device: TomTom GO 940/740/540 TomTom GO 930/730/630/530 TomTom GO 920/720/520 TomTom GO 910/710/510 TomTom GO, GO 300/500/700 TomTom XL IQ Routes TomTom XL (30-Series) TomTom ONE XL TomTom ONE IQ Routes TomTom ONE 30 Series TomTom ONE 3rd Edition TomTom ONE 2nd Edition TomTom ONE 1st Edition TomTom RIDER 1st Edition, RIDER 2nd Edition TomTom ECLIPSE II TomTom DAIHATSU, TomTom ECLIPSE, TomTom TOYOTA Help Not sure which device you have? Type the first two characters of your device's serial number below to find out.



To reset your TomTom device, do the following:

1. Check that the battery is charged properly.
   Charge your device for at least 2 hours before trying to turn it on again. Make sure the charging light on your device is on.
   
   
2. Remove the SD card
   If your device uses an SD card, remove it.
   
   
3. Reset your device.
   Use a straightened paper clip, or something similar, to push the reset button for 15 seconds. See the pictures below for where to find the reset button.
   
   
4. Turn your device on.
   Press the On/off button for at least 5 seconds.
   
   
5. Insert the SD card
   If your device uses an SD card, insert the SD card.
   

The rest button is on the top of the GPS

go on to settings till u find clock and reset it

Tap "Reset factory settings" button to restore the factory settings to your TomTom XL. All your settings, including Favourites, your Home location, warnings for POIs and any Itineraries you have created are deleted.


Tap "Set Clock" button to select the type of clock that is shown and set the time.

manual download
go to tomtom website ----> support scroll down at the right hand side click Find downloads

hope this help

20/Apr/09

Go to "change preferences" and find on page 8 you should find the "set clock" button to change the time.

From the Main Menu, click Change preferences

there is a clock icon in this menu set

Tap this button to select the type of clock that is shown and set the time

Have you gone to the TomTom site to see if there are any new upgrades. There may have been a miss program in that model that may need to be upgraded.. I use a tomtom and have not had any trouble.

tap the screen for menu
tap change preferences
tap through 4 page screens and select "set Clock"
~ after you select the display style, a screen will appear to set the time.

luck!