Calculator is not printing correctly? I just bought new ink cartridges for the calculator and the numbers are not clear when it's printing out and it's not calculating the numbers I am putting in. Also, it will not subtract numbers.

SOURCE: Calculator print problem

try to move switch into p. or print position

SOURCE: Addition Problem with HP 17BII

do a self test

1. Turn the calculator on.
2. If you have the optional infrared printer, turn it on. Certain diagnostic
information is printed during the test.
3. If possible, return to the MAIN menu (press @A).
4. To start the self-test, hold down C while you press the fifth menu
key from the left. Once the self-test has begun, do not press any keys
until you are ready to halt the test.
5. During the test, the calculator beeps periodically and displays various
patterns and characters. Watch for one of two messages that are
displayed before the test automatically repeats:
􀂄 If the calculator passes the self-test, the calculator displays
        
􀂄 If the calculator displays     followed by a five-digit number,
the calculator requires service.
6. To halt the self-test, hold down C while you press the third menu
key from the left. The calculator displays             . If you
press any other key instead, the test halts and the calculator displays
a     message. This results from an incorrect key being pressed,
and does not mean that the calculator requires service.
7. If the calculator failed the self-test, repeat steps 4 through 6 to verify
the results. If you do not have a printer, write down the messages that
are displayed in step 5.

SOURCE: Trying to find standard deviation on the calculator

I took statistics last semester and I don't really remember how, but after you enter your data, you press SHIFT, then STAT (on the 1 key), then I think it's under 5 (VAR), and maybe Xon-1? Eh, funny how long you remember this stuff for....

SOURCE: faint numbers show on screen of T-85 texas calculator

Hello,
Make sure you have fresh batteries. Increase contrast

First possibility.
Press [2nd] and hold pressure
Press UpArrow and repeat this step

2nd Possibility
Press [2nd] key then release
Press UpArrow then release
Repeat the two steps in sequence till contrast is to you liking.

Hope it helps.

SOURCE: how do you subtract

Its a little strange. Suppose you want subtract 10 from 38. Do this:
Enter 38 press plus key.
Enter 10, press minus key.
Press the equal sign. You will have the result.