How do you perform a self test on an HP 11C?

Discussion:

(too old to reply)

Eric Dickerson

2004-05-31 21:43:33 UTC

I recently found an HP 11C at a yard sale for $0.50, but I don't know
how to test it. I put batteries in it and it works, but I know there
is a better, more thorough way to test it! Thanks in advance,

Eric

Chris W

2004-06-01 00:04:07 UTC

Permalink

Post by Eric Dickerson
I recently found an HP 11C at a yard sale for $0.50, but I don't know
how to test it. I put batteries in it and it works, but I know there
is a better, more thorough way to test it! Thanks in advance,
Eric

quoting from the hpmuseum.org . . .
" Self test: with the calculator off, hold the × key and press ON. The
calculator will display running for around half a minute and then
activate the entire display to indicate success. The test my be done
continuously by pressing + while holding the ON key. To stop the
continuous test at the end of the current iteration, press and hold -
and then press ON."

" There is also a keyboard test. With the calculator off, press and hold
÷ and press ON. Now press each key from the top left moving left to
right and then down (the enter key gets pressed in both the third and
fourth rows.) If all keys are pressed in the correct order and are
working, the model number (without the C) is displayed. Otherwise, Error
9 is displayed. (The display will show a changing pattern of segments as
keys are pressed.)"

http://www.hpmuseum.org/features/11cf.htm

--
Chris W

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Eric Dickerson

2004-06-01 22:37:05 UTC

Permalink

Post by Chris W

quoting from the hpmuseum.org . . .
" Self test: with the calculator off, hold the × key and press ON. The
calculator will display running for around half a minute and then
activate the entire display to indicate success. The test my be done
continuously by pressing + while holding the ON key. To stop the
continuous test at the end of the current iteration, press and hold -
and then press ON."
" There is also a keyboard test. With the calculator off, press and hold
÷ and press ON. Now press each key from the top left moving left to
right and then down (the enter key gets pressed in both the third and
fourth rows.) If all keys are pressed in the correct order and are
working, the model number (without the C) is displayed. Otherwise, Error
9 is displayed. (The display will show a changing pattern of segments as
keys are pressed.)"
http://www.hpmuseum.org/features/11cf.htm

Chris,
Thanks. I totally forgot that www.hpmuseum.org has this information
for most calculators. Thanks again for the information.

Eric