Question about Canon P23-DHV Calculator

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Removing the cushion, that came with it....brand new

Can not seem to figure out how to get the little sponge like thing out?

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Gently Press the plastic window down and slide it out away from the calculator in the direction of the arrow.

Posted on Jul 12, 2008

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HP 50G wont turn on. The thing is only 2 years old. The batteries went and so I replaced them and no response. Even with the reset, I dont get anything

Well, it's either a new set of batteries or simply reinserting them to establish better contact. Another thing to watch out for: after a time the metal contacts can get bent out of shape so they no longer press against the batteries hard enough for reliable contact. The fix for this is to fold up a small piece of paper and jam it under the contact to add a little thickness.
Anyway, glad to hear you're back up and running.

Mar 26, 2012 | HP 50g Graphic Calculator

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I put in new batteries; calculator turned on but I could not clear the screen nor input any thing. Now it wont turn on.

Open the back of your calculator. There is a backup battery behind a little door that you will have to remove with a small phillips screwdriver. The only thing that I can figure out is that you either need to leave this battery out for about 10 hours and put it back in and hopefully the calculator will reset itself. If not, you might try replacing this backup battery. Hope this helps.

Jun 27, 2011 | Texas Instruments TI-83 Plus Calculator

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My TI-84 is frozen/extremely irresponsive. I've tried removing a battery and replacing them with new ones. I've tried holding clear while removing and inserting a battery. Also have tried holding del while...

Try taking the batteries out for more than 30 seconds, then holding on while putting them back in. Then press enter when you try to graph.
If that doesn't work, there seems to be a problem with your firmware, you will want to send the calculator back to TI.
Best of luck!!!

Mar 22, 2011 | Texas Instruments TI-84 Plus Calculator

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Ti-84 Plus help!!

It seems like you're just starting off. And....

....The best thing you can do is begin hacking away at different buttons until you figure out what certain things do. I guarantee, that you will discover some pretty amazing things within the TI-84.

Compared to other calculators, the TI-84 is pretty user-friendly. Don't be scared.

In my opinion, Texas Instruments' customer service is one of the best in the nation. Call them for specific questions, they're great at the basics but not-so hot at the advanced. Friendly & helpful people, though.

Mar 05, 2011 | Texas Instruments TI-84 Plus Silver...

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Can you change the ribbon

Yes you can. That type of calculator has two separate ink rollers, one black & one red. They are easy to remove by putting your finger around the little ink roller & sliding it out towards you, the new one will lightly click into place. You can buy the sharp brand of ink rollers or a generic brand that will fit your calculator.

Jan 25, 2011 | Sharp EL-1701C Calculator

1 Answer

Ink problems?

If there is no ink you can see about taking it to your local Cartridge World store and ask them if they can re-ink the sponge. At my store we do this for no cost since in only uses a few drops. They won't have a "purple" ink like the calculators typically come with, but they should be able to use a dye based black ink used in some Canon printers that will do the job.

Dec 18, 2009 | Canon P170-DH Calculator

1 Answer

When I try to reset calculator (pressing the little thing on the back) it will not reset (not emptying the functions)

If there is a reset button or a hole, the calculator should reset. If it is a hole use a paper clip and press firmly, though not to the point of bending the clip.
It might be well advised to specify the calculator brand: it makes things easier for us, for we cannot guess what machine it is.
Hope it helps

Sep 30, 2009 | Casio Office Equipment & Supplies

1 Answer

Replacing inking roller/ribbon?

i had a problem with this as well and found a user manual online. I thought the whole thing came out but it doesn't. If you pull up on the little red thing on right and then the black one on the right you have it. Imagine that! That's all that you change. Then just put some new ones in and your good to go.

Jan 14, 2009 | Sharp EL-2192Rll Calculator

2 Answers


Sounds like the printwheels are out of time. Sorta of major repairs. gears on side of printer have to be lined up in proper areas. there are small black arrows on the gears. Best bet is look at a working machine and try to line up. Machine may not be worth the time unless you jsut want to try it. Sharp uses the same printers in many different models.

Jun 21, 2008 | Sharp EL-1611P Calculator

1 Answer

Ink rollers

Unless the ink roller that you installed was dried out, usually, the replacement rollers just snap in place and are good to go. Check to make sure there is ink on the roller by either pulling the ink roller out again, and touching it with your finger. If no ink on your finger, you might have received a dried out replacement roller. Also the roller should be somewhat like a sponge. If you push against the sponge and it doesnt spring back and it stays indented, then the roller might also be bad. If you happen to have a bottle of ink for an ink pad, you can try soaking the roller with the ink so the roller is wet, (but not DRIPPING WET) and try it again in the calculator. IF you get some image for a little while, then I would say try a new fresh ink roller.
Hope this helps.

Feb 04, 2008 | Sharp EL-2192Rll Calculator

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