hello!!

i´ve to change the batteries (to prevent battery failure) on my num 1060.
this 1,2v batteries are welded to the PCS and i need to take off the board to weld the new ones, but I don´t know if when i do this num will lose data and programs.
can i take off the mem board with the machine switched on without risk of data loosing?
how can i do it?
thanks a lot.