on off switch fault

i have a 6 month old tom tom go 530T and it wont switch on. the battery is fully charged, but it wont switch on, any idea's before i try to return it to Amazon for repair?

[mikealder]

Have you tried pressing the reset button for a few seconds? this is located on the base of the device and best pressed with a bent paperclip, if this doesn't fix the device get an RMA number and send it back (Uk Support phone is 0845 161 0009) - Mike