HP 41 CX decimal/comma probload

HP 41CX Decimal Point restore
Message #1 Posted by Joseph Banki on 22 Apr 2011, 7:06 p.m.

Hi;

After replacing the batteries, the decimal point became a comma, and can not restore it. Also I always used 4 decimals before and that does not come back either. I have the Basics Volume 1 only, and Volume 2 or 3 (?) handles that. Could you help?

Thank you

Joseph Banki enj-banki@sbcglobal.net 281-788-4007

Re: HP 41CX Decimal Point restore
Message #2 Posted by spb on 22 Apr 2011, 7:52 p.m.,
in response to message #1 by Joseph Banki

SF 28

Flag 28 controls the behaviour; when set the separator between the integer and decimal part is a period and the digit separator for the powers of three (if set) is a comma, and when cleared the semantics are reversed.

Many languages are like that. I know German's do numbers that way.

Turn off the calculator. Hold down the soft keys A and E and press the on key at the same time. This should reset it.

If all else fails, do a hard reset. Flip over the calculator, pull out the rubber foot that is on the top right. There should be a hoe that a paper clip will fit into. Insert paper clip push slightly and it should reset back to factory settings. It has been a while since I had to do this.

Thank y'all.

Tried it but it still doesn't work properly.

I'll have a go this weekend.

Cheers,

Derek

My 41CX is long, long DOA. But I remember similar happening.

This link has pictures:

http://www.educalc.net/1178487.page

I now have three HP's that this works on:

Turn off the calculator.

Hold down the decimal point.

Continue to hold the decimal point key, while turning on the calculator.

M

User flag 28 controls that. SF 28

Thank you all for your help.

Mark, atta boy !

Do you fix HPs ?

DGG is not frustrated any longer.

It must be approaching at least 30 years that I've used the HP 41CX.

Cheers,

Derek