Thanks Tony.=A0 As you suggested there are 10 wires connecting the main boa=
 rd to the keypad.=A0 As in 4 x 6.=A0 I fiddled around a little, gently.=A0 =
 I've ruined another similar unit by cutting those wires in hopes of reattac= 
I think if i had to seaprate the keybaord from the logic board in one of
those calculators, I'd desolder the wires at the PCB end.
-tony