wow I'm following airie's tracks, anyway if you are bored....
If you have a CASIO fx-82MS calculator, press [7], [SHIFT] and [ON] simultaneously.
This passcode apparently opens up the diagnostics.
Press [SHIFT] to undergo LCD display checks to make sure when you display a number a segment isn't missing, so a 7 isn't a one.
With each press of
[SHIFT]
Half the entire LCD is displayed
The other half will be displayed
0 will display in the lower display and the exponential and indices display.
and so on until 9 ...
To check all buttons work after completing display checks, press these in order:
[SHIFT]
[ALPHA]
[MODE]
on replay button
[UP] on replay button
on replay button
[x-1]
[nCr]
[Pol(]
[x3]
[DOWN] on replay button
[a/b/c]
[√]
[x2]
[^]
[log]
[ln]
[(-)]
[0 ' '']
[hyp]
[sin]
[cos]
[tan]
[RCL]
[ENG]
[(]
[)]
[,]
[M+]
[7]
[8]
[9]
[DEL]
[AC]
[4]
[5]
[6]
[X]
the divide button
[1]
[2]
[3]
[+]
[-]
[0]
[.]
[EXP]
[Ans]
[=]
You should have pressed 49 buttons at least.
On my calculator it displays "35-018 OK", something like "4 OK"
should appear, return to normal mode by pressing [ON]