I have five calculator of the 3x series, three out Singapore and two out the USA.
The two USA-models have the same character - the upper three keyboard rows rattles and when I operate a key the upper three rows ( function keys) twists herself the whole row. Also smoulders leg execute arithmetic operation that minus -character.
Is that normal ?
This text was written with an translation program (PC) , I hope you can read it.
Can I stop the rattle of the keys ?
Now I use me shool english - I have tryed to open one 3x but stopped, cause I was afraid to demage the back.
How hard must I try ??
regards