Tom tom 1xl

Please give the exact model number of the tom tom unit. keep updated. Thanks.

If you wisely made a backup of your device using 'Tom Tom Home', use the 'RESTORE' option!

Otherwise try 'Tom Tom Home' while connected to the Internet and select 'Update' my One: it should re-load and update all missing components (including the MAP) that your machine is allowed to have.

Remove the SD card

The card needs to be formatted properly first that's all,

formatting is better done in a card reader.

Right click on it and select format select FAT32 as the files system

Update your device without the SD card.

Make sure your GPS runs OK without the SD card

Now re-connect the tomtom but don't let tomtom home run. exit TTH if need be.

You now ned to select your tom tom which will also show as a drive.

In windows explorer select tools then folder options.

Click view and tick the box for "show hidden files and folders"
It may warn you but you can ignore it.

then just copy ALL the files from the tom tom to your sd card

DO NOT USE CUT AND PASTE !

Once all the files are on switch off the tom tom and insert the sd card and re-boot
It should now work again

This problem is due to the memory card not containing the TomTom application or map. To update the application onto the memory card, Connect the device to your computer. Open the TomTom Home application. Click on 'Update My Device'. This should then install the application onto the SD card. Alternativly, you could perform all the steps above without the SD card in the device, this will install the application onto the internal memory. Note: you may also need to install your maps, voices, etc after you update.

Have you gone to the tom-tom web site and downloaded the Tom Tom home? If not I would recommend that first. There are many upgrades and additions there. But I do not believe you can update the 300 without being connected to your computer via usb cable and being on the tom tom site with tom tom home downloaded.
Hope this helps

One hour is about the time the unit will run without a power source.

You need to check that the cigarette lighter is working. Check the car fuse.

Check the fuse (one of the six bumps) on the cigarette lighter plug has not blown.

Is the cigarette lighter / Tom Tom lead damaged in any way?
Peter

I was able to speak with Tech Support at Tom Tom and got sent some links for solutions to these problems.  I was able to solve the problem following directions from this website.  Without that response of the support person to this specific problem, I would still be without my new GPS system.  Turned out that there is a conflict with the MAC OS and updates to Tom Tom, but there is a solution to this that worked for me.
If you get the continual red circle with blinking "X" and recently tried updating either your maps or most recent app, here are the two web links that will solve the problem:
www.tomtom.com/10324 (to disable SPOTLIGHT from causing a conflict on the Tom Tom ONE)
www.tomtom.com/9091 (general info for removing software and re-installing software to the Tom Tom ONE)
Do the disabling of SPOTLIGHT first, then remove and re-load software for Tom Tom ONE.  Good Luck.  This did the trick for me.

http://www.tomtom.com/support/index.php?Language=1&query=wont+turn+on&FID=9080

if this is very new construction i would say with in the last couple of ears it will not be updated on the newest map for awhile and maybe longer if you are in a rural area

Hold the reset button until you see it start up again. If this does not work plug it into a power source via USB and then do another reset.