Have found the problem, looking for solutions on line some persons stated they had problems with tomtom home.
I remembered the last time I installed the latest sat fix update I had a error message of some kind. So I loaded my SD card and restored my back up. and all is now well. voice restored no idea what went wrong with home but will make sure I back up every time in future and probably copy SD card in another folder just in case. Thank you to any one who looked for a solution to problem.