00 sentra dash problem
 

i have a 2000 sentra with a dash probelm i need help with.
all the needles (eg temp gauge,tach etc)quit operating and we replaced the dash with a salvage yard dash and it seemed to work fine fora bit and then did it again. the needles will quit working at various times and work ot other times. do i just have another bad dash or is it a deeper problem?
thanks
todd