TomTom Go 710

SOURCE: tomtom 710 broken

there is a small reset button you can push with a pin. Revived my "dead" 910...

SOURCE: i have a tomtom 710

Ok, lets start with explaining the different code types:

Product code
The TomTom product code consists of 15 characters. It is a unique code to prove that you have an official TomTom product and hence you need it for product activation.

Device code
The device code consists of 10 characters. It is different for every device, so make sure you use the device code for your own device, on which you want to use the software.
When you activate manually the device code is shown on your device during activation.
Click here for help on where to find your device code.

Activation code
The activation code consists of 15 characters. It is generated from the product code and the device code. This activation code is required to run the software on your device. It only enables the software to run on that particular device.
Automatic activation
In most cases the software is activated automatically using an existing internet connection.
Manual activation
In some cases you may have to manually activate your software. In this case the product code and the device code generate a unique activation code. Enter this code on your device.
Go to http://www.ttcode.com/ to obtain an activation code for manual activation.

What to do if the activation fails
Make sure you have the latest version of the TomTom application installed on your TomTom device.
If you can’t activate a map on your TomTom GO / ONE / RIDER,
download Clear_Flash, follow instructions here

SOURCE: Battery replacement for TomTom 710

I have found a trick for those bad battery ,but you lose your waranty
you need to open your tomtom , behind the screen you wil find the battery(for the Go 710 it is an 3.7 V ,2400mAh,samsung ICR18650-24)
you find 3 wires : red, black,yellow cut them of at the half of the wire size
, then cut off your car loader wire (tomtom)(5v), you will see again 3 wires inside :red,black,white
connect the red with red, black with black, white with yellow
(the best thing is to make a little hole in the cover to pass the wire, so it will be beter for closing the all thing)
I did it and it works pretty fine ,I had save 30 dollars ;) :D
I did in approximatly 30 min
remember you will have no battery any more and no waranty of tomtom!
It only whorks then with your car loader tomtom

SOURCE: Tomtom 710 My tomtom 710 charges

First, reset:
http://www.tomtom.com/support/index.php?Language=1&query=reset&FID=6965

Then, hold down the power on button for several secs,
at least 7...

SOURCE: tomtom 710 broken

Pin idea close but bad, due to pointyness.
use a paperclip to press the RESET button.
this won't junk the gel button you are trying to press.

soft reset, push & you feel a 'click' action of button - press & release

hard reset, push (feel 'click' action) and hold for 20 secs or so

Also, remove card can trigger a soft reset.

Possible battery shot or board defective...