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HP Forum Archive 14

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HP-42S fail message
Message #1 Posted by John on 11 Apr 2005, 2:38 a.m.

I just bought an HP-42S (without batteries) at a flea market. Back home I put batteries in and when I ran the self test I get a "fail 00020" message. What does this mean and can this be fixed?

      
Re: HP-42S fail message
Message #2 Posted by Erik Ehrling (Sweden) on 11 Apr 2005, 9:45 a.m.,
in response to message #1 by John

Quote:
I just bought an HP-42S (without batteries) at a flea market. Back home I put batteries in and when I ran the self test I get a "fail 00020" message. What does this mean and can this be fixed?
I suppose that you are running the EXIT + LN test? It is normal for this test to display "FAIL 00020" when you break out of the test by pressing any key. What is important is whether it displays the "OK-42S-E" message or not before the test loops... Hopefully it does display the "OK-42S-E" message - and your HP-42S is all OK!

Best regards,
Erik Ehrling (Sweden)

            
Re: HP-42S fail message
Message #3 Posted by John on 11 Apr 2005, 10:37 a.m.,
in response to message #2 by Erik Ehrling (Sweden)

Hi Erik, Nope, I'm not getting that "OK-42S-E" message during the manual self test. The other self test, the continual test does not run. Odd thing is that I am sometimes getting a "Machine Reset" or a "Memory Clear" message when I press the LN, XEQ, COS, TAN, or E key. Occasionally the ENTER key or EXIT key produces a continual beep sound. I am definitely baffled. John

                  
Re: HP-42S fail message
Message #4 Posted by Nelson M. Sicuro (Brasil) on 11 Apr 2005, 1:25 p.m.,
in response to message #3 by John

Maybe this can be a bad contact on the memory chip (broken/cold solder?)...

Best regards,

Nelson

                        
Re: HP-42S fail message
Message #5 Posted by Erik Ehrling (Sweden) on 11 Apr 2005, 5:08 p.m.,
in response to message #4 by Nelson M. Sicuro (Brasil)

Quote:
Maybe this can be a bad contact on the memory chip (broken/cold solder?)...
Yes, the constant beep definitely sounds like it, in that case it would make for a golden opportunity for a RAM upgrade :-)

Best regards,
Erik Ehrling (Sweden)

Edited: 11 Apr 2005, 5:26 p.m.


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