My tomtom one gps can't get signal

Often, when your GPS is in a "covered" area ... e.g. inside a building, in a tunnel, under a bridge, amongst / under tall buildings, etc... when there is no open space (directly) between your GPS and the satellites, your GPS will loose its satellite signals. If you're in such locations, try to find some "open space" and wait a bit for the signals to be picked up again.
Another common reason why the GPS doesn't get signals, or doesn't get the signals quickly, is because the "latest" satellite positions (locations) have not been updated in your GPS. If/when you connect your GPS to your computer (e.g. using HOME ) and download the GPS satellite (QuickFix) location information, your GPS will have the most recent locations of the satellites in your vicinity/region. With this information, your GPS can pick up the signals more quickly ... instead of having to search/scan around to find the signals ... which can take a bit more time. While your GPS is searching for the satellite signals, it shows the "signal lost" or "no GPS signal" message.

The Tomtom devices need to locate GPS satellites in the sky in order to work. Unlike TV satellites, these do not have fixed positions but move relatively to the ground. The Tomtom can locate them by scanning the hemisphere, but this takes up to ten minutes after you switch on the device.

To speed up the process, the Tomtom receivers can use a helper file stored on the device. It holds precomputed positional data for the GPS satellites that makes finding them a matter of a few seconds.

However, the file holds precomputed data for some two weeks in advance only. After this period, the Tomtom device has to resort to the slow scanning procedure.

You will need to connect your Tomtom device to a PC with the "Tomtom HOME" software installed, available from the Tomtom company web site. Use the software by following the onscreen instructions to update the package "QuickGPSFix" at least once every two weeks and you will find your device much more swift in establishing GPS connection.

Note also, all GPS devices require clear view of the sky. They do not work inside buildings, in tunnels, through the roof of the car, and even trees or buildings near to the car may compromise GPS reception. Make sure the device is mounted in an area of the windshield where it can "see" the satellites.
Some cars have metallic a coating on the windows (used for sunlight filtering and "can look outside - can't look inside" fancies). There are reports that these coatings also interfere with GPS receivers' ability to receive the satellite signals.

There is nothing wrong with the signal, I know this because I just used my GPS, the problem is that the receiver for the signal from the orbiting geosynchronous satellites is defective, you will either have to send it in to Tomtom for repair or replace it based on repair cost, which on average is $125.00 (USD)

Replace the battery!. Maximum life is two years. If you have not fully charged it by usb or ac prior to a trip and then connected it to the 12v car outlet before starting the engine the battery becomes damaged overtime.
Battery level determines the time it takes to make a connection. Always keep it charged. Never plug it into 12v car power when starting engine. This will not only shorten the life of the battery, but wiull damage the SIIRF chip.

Please rate my help++++Thanks for uising FIXYA

here are some tips on what to do ,To pinpoint your location, you need to get signals from at least 4 satellites. If you receive signals from less than 4 satellites or the signals are not strong enough, the Driving View stays grey and one of the following messages is shown in the bottom right corner of the Driving View:

• Waiting for a valid GPS signal
• The GPS signal was lost sec ago

Note: In previous versions of the TomTom application the message may vary.
If you see any of these messages, try the following:

Finding a GPS signal
In the following cases it can take up to 5 minutes to find your current position:

• You use your TomTom device for the first time.
• You haven't used your TomTom device for a longer time.
• Your TomTom device has been relocated without using it (e.g. after travelling by plane or train).

If it takes longer than 5 minutes, make sure that you are in an open place without tall buildings or trees around you.
Once your TomTom device has located your current position, the Driving View is shown in full colour and shows your position on the map.
Tip: Most TomTom devices can use QuickGPSfix™ to locate your current position faster. Flight mode
On devices with built-in GPRS connectivity, flight mode also disables your device’s GPS reception.
To switch flight mode off, tap Flight mode in the preferences menu and then select Restore connections.
Clear View
Your TomTom device must be outdoors to locate your current position.
Try repositioning your device in your car; ideally, try to position it at the lowest possible point directly on the windscreen.
Some vehicles have a heat reflective shield embedded in the windscreen, which may prevent your device from locating your current position. If this is the case in your vehicle, use the TomTom External Antenna Kit (available as an accessory).
Tip: As a reference, place your device outside your parked car to see if it can find your current position.
Reset your device
Reset your TomTom device. Click here to learn how to reset your device.
Install the latest application
We recommend always having the latest version of our application installed on your device.

try downloading the latest GPSfix updates using the tomtom home software

To pinpoint your location, you need to get signals from at least 4 satellites. If you receive signals from less than 4 satellites or the signals are not strong enough, the Driving View stays grey and one of the following messages is shown in the bottom right corner of the Driving View:

• Waiting for a valid GPS signal…
• The GPS signal was lost … sec ago

Note: In previous versions of the TomTom application the message may vary.

If you see any of these messages, try the following:

Finding a GPS signal
In the following cases it can take up to 5 minutes to find your current position:

• You use your TomTom device for the first time.
• You haven't used your TomTom device for a longer time.
• Your TomTom device has been relocated without using it (e.g. after travelling by plane or train).

If it takes longer than 5 minutes, make sure that you are in an open place without tall buildings or trees around you.
Once your TomTom device has located your current position, the Driving View is shown in full colour and shows your position on the map.
Tip: Most TomTom devices can use QuickGPSfix™ to locate your current position faster.

Clear View
Your TomTom device must be outdoors to locate your current position.
Try repositioning your device in your car; ideally, try to position it at the lowest possible point directly on the windscreen.
Some vehicles have a heat reflective shield embedded in the windscreen, which may prevent your device from locating your current position. If this is the case in your vehicle, use the TomTom External Antenna Kit (available as an accessory).
Tip: As a reference, place your device outside your parked car to see if it can find your current position.

Make sure battery is fully charged before use

Reset your device

couple of things, battery not fully charged (AC)
No view of the sky
burned out SIIRF CHIP

Make sure you are outdoors. Some buildings are well shielded due to their construction.

If you are not downloading the GPS Quickfix every week then it will take much longer for the unit to acquire satellites. Perhaps as much as five minutes.

If you are outside set in a destination and if you have not got satellites within a few minutes then drive a a few tens of yards and it should suddenly find satellites. Happens to my unit as well.
HTH
Peter

I suddenly lost the GPS signal today and could not get it back. All I got was the "No valid GPS signal". My solution was to tap on the GPS satellite bars when in the route map. this brought up the "Status summary page of the TOMTOM.

I then again tapped the satellite bar which brought up the "GPS Status" page. I then tapped the bar labeled "configure".

The radio button next to the option titled "Minutes (dm.m') was selected. I then moved the selection to "Degrees (d.d) and it started working.

I had just downloaded the GPS fix 5 days ago so it is not like this suddenly caused it to stop working.

This may not work for everyone but this is what it took to get mine working.

Cheers