I have a lilliput 619 touchscreen display. over the summer the touch function has slowly been degrading. At first no matter where i would touch the pointer would go to the bottom left corner. when i would calibrate the screen it would be fine for a while and then start going to the bottom left. afte a while when i would calibrate the pointer would be off any where from a cm to an inch depending on where i touched the screen. now my screen will not calibrate at all. The controller is recognized by windows and touch kit but will not do anything. the only thing i can think of is that the touch panel does not work anymore. is there anyway for me to test this? or does anybody have any other ideas as to what could be the problem? thanks for your help.