My Tom Tom one starts off ok and then after about 3 minutes the voice stops but the instructions are still on the screen. Each time I turn it off it starts correctly then the voice goes. Help

Did you go into your preferences and check to see the voice option is enabled? Also select some other type voice and see if it works.

Its not uncommon for some GPS to take a while to "warm up"

Check the tom tom site as some tom toms have a quick sat finder update. If you use tom tom home on your computer it usually has an UPDATE option where it will go online and get any fixes etc for your device.

Even then you may still see over a minute or so to boot up.

From the main menu tap preferences.

To change the volume, tap Volume preferences in the Preferences menu. You will probably see a little "speaker" icon with an X through it. Tap this to turn the sound back on.
To change the volume quickly while you are driving, tap the bottom left-hand section of the Driving View and move the slider.

To change the voice, tap Change Voice in the Preferences menu.

These steps are for my TomTom One (2008) model.

1. Once you have turned on your TomTom tap the screen.
2. Tap 'Change preferences'
3. Tap the arrow to get to page 2 of Preferences
4. Tap 'Change voice'
5. Tap arrows until you get a computer voice - I chose Samantha.
6. Tap the 'Select' button to the right of the voice picture.
7. This screen is labelled 'Speech preferences' and the first one is 'Read aloud street names'
8. Tap the box to the right to select this preference.

Good luck.

I had the same problem. I took off the plastic screen protecter that I had placed on it (the same plastic you place on a camera screen to stop it from getting scratched and dirty) and cleaned out the crevices around the screen as I thought that maybe the dirt and the plastic was pushing on the screen and making it super sensitive. (and there was quite a bit of grime after owning it for a little over a year) So far it solved the problem. Hope this works for you.
When I called Tom-Tom they told me I could not get it repaired after the warranty was over, which means no more Tom-Tom products for me, and that the only way it might work would be for me to erase all memory and re-download... and I would have lost all of the voice programs on it. The voice instructions was the only reason I purchased it at $400. Now I own a new Garmin as back up on the road in case this thing should break down. At least the Garmin can be sent in for repairs once the warranty is over. Good luck!

This is a battery save setting.
Check settings under Battery Saving Preferences, choose Never Turn Off Screen

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To change the voice, tap the main part of the screen. Then click on the "wrench" icon (Change preferences). Then, click on the blue arrow to go to the next page. Then, click on the "mouth" icon (Change voice).

To change the time (clock), tap the main part of the screen. Then click on the "wrench" icon (Change preferences). Then, click on the blue arrow (4x) to go to the 5th page (Preferences 5 of 5). Click on the "clock" icon (Set clock).

Have you tried resetting the unit? Does it do the same thing after being reset?

alrighty. i tried to download some voices for it. go to my computer, voices. (or whatever you downloaded) look for the recovered fragment files. Delete them . that helped with my tom tom 1