tomtom goes off/blank after a while when it is switched on

Hello,

My Tomtom GO61 comes on and then suddenly goes BLANK and does NOT return to normal...... where can I send it for Repairs?

What must I personally do to get it corrected. Most often, by Software Updates it shuts down and the download is broken for good.

What must I do or Where Can I send it for REPAIRS?

JacobA