Question about Canon P23-DHV Calculator

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The calculator turns itself off after a short time of non-use, so I have to re-enter whatever I was calculating. Is this normal, or do I have a defective machine?

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This is normal, Just everyonce in a while you will have to turn it back on.

Posted on Feb 10, 2010


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Short answer is no. These are low end calculaotors and parts are hard to obtain. These calculators are cheap and basically disposable. It is cost prohibitive to replace the printer in them.

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How does my Casio calculator keeping switching itself off after a few seconds?

It is trying to save battery power. Just turn it off yourself when you finish. Read the manual and try to discover if there is a way to choose the idle time before it powers down.

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TI 84 Plus had some water damage. Calculator works except for certain keys (0, ., (-) and enter. Any ideas?

If you're adventurous:
note the location of the non-working keys
take the batteries out
unscrew all screws from the back of the calculator
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Mar 11, 2011 | Texas Instruments TI-84 Plus Calculator

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I would like to add hold number

In order to store a number in your calculator, press "STO->" and enter a letter by pressing ALPHA and then whatever key has the letter you want on it. For example, pressing STO->, then ALPHA and then the MATH button will store whatever your previous answer was in the letter A. Then, anytime you enter the letter A into a calculation, your calculator will use the value you stored in the calculation.

Jan 11, 2011 | Texas Instruments TI-83 Plus Calculator

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When I type a problem into the TI84 it will give me the answer with an Error. Example, I type in 2+2 and get 4E0. This happens with everything I enter into the calculator. How to I fix this?

Sorry, but it takes sometime to be well familiar with the calculator. The E in the result is a short-hand notation for times 10 to a power. What you got is 4x10^(0) which is just 4.
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To revert to the format you may be more accustomed to,
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  2. The first line of the displayed screen will show NORMAL SCI ENG and the cursor blinking on SCI or ENG.
  3. Use the left arrow to highlight NORMAL and press ENTER.
  4. Press [2nd][MODE] to (QUIT) and go to main calculator screen.

Aug 25, 2010 | Texas Instruments TI-84 Plus Calculator

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I want to time something to the 25th do I do that?

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Not knowing what to do, I tried anything that could possibly help:

I installed fresh batteries and I pushed the reset button on the back of the calculator (Sharp EL-546L) and finally, it work all right after more than 5 years I own the calculator and where it did work correctly for 5 minutes. I tried the reset button in the past (long time ago) and it didn't work. This time it worked because, maybe, I've used fresh batteries.


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I think the F-D function only works one direction from fraction to decimal. Decimal to fraction is a non trivial calculation that can have multiple answers so doesn't lend itself to a calculator feature.

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TI-84 Plus: Calculator Unresponsive

Try pressing the "On" button a couple times. That should work

Oct 27, 2007 | Texas Instruments TI-84 Plus Calculator

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