Handmark Software MobileLists (950142) for PC, Mac "china mobile keypad" Questions

china mobile I cont view the display, but all functions are working. even display light is not working only keypad buttons are working i have a china nktel A600 mobile but i cant view the display, but

china mobile I cont view the display, but all functions are working. even display light is not working only keypad buttons are working i have a china nktel A600 mobile but i cant view the display, but

mobile key pad all button not working only end button(red) working for switch on & i can't switch off with end (red) button china mobiles some keypad is not working. How to solve this probleme????????