Tom tom 720 will not switch on

What is your charging method? In car or house hold plug? Suggest that charger is not working (Green) if light on Tom Tom (at bottom near charger lead) is not lighting. Check your charger and see if you have an indicator light on it showing it is on. If yes, plug in Tom, then press and hold the "on" button for 15 seconds constinuously. Tom Tom should reboot.

if all you are getting is a green light and no screen coming on, you have blown one of two chips inside it by using a dodgy car charger

Have you tried to connect to a desk top through the USB port to isolate the laptop or GPS issue.

If you get the same problem with a desktop than I would suggest that you perform a hard reset to the GPS. This is done through the pin hole in the case labled "Reset" insert the tip of a paper clip into the reset hole and reset the device.

If this fails try reloading the GPS software, there are instructions on the Tom Tom web site

The GO 720 charges quite slowly when attached to the in-vehicle cigarette lighter cord. If you have a USB attachment (that allows you to connect the GO720 to your computer) just insert the GO720 into the USB cradle - you don't have to turn it on - and let it sit there for about 10 hours. You should see the green light on the GO720 indicating that power is being received. In fact, I don't think you even need to turn on the computer, as power is always fed to the USB circuit. If you see the green light, then the GO720 is being charged. I think your GPS just needs a good charge.

if it does not proceed when the icon is selected, presume data corruption or in fact no data.
TomTom is renouned for this type of problem.
try rteinstalling the map data from the source.

try a reset first ( small pinhole on rear) put open paperclip end in and gently push the button inside) if this still fails then data installation is the go

You need to press and hold the power button down until you see the screen come on.

I had the same problem with the go 920, I thought it was broken, 
Solution was to insert pin into reset hole for 15 Sec, after which hold the power on button for at least 5 Secs

Change the motherboard, green light on and nothing happening is quite common, you can find motherboards on ebay for £22 +p&p.

Its quite easy to do and worth while as the 710 and 910 are still very good units.

www.batteryship.com

look up tomtom 510 - or whatever model you have
Order the battery..........comes with manual and tools to fix it
only 20.95
it works

cheaper than sending it in!!!!!!
These are genuine replacement parts!!

Laura

I have exactly the same problem. Everything worked fine until I did a software upgrade. I have tried the reset suggestion but it has not fixed the problem. I have been told that a possible solution is to install the version of the OS that was there prior to the upgrade but I cannot find this anywhere