Question about Sharp EL-1701C Calculator

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Key pad selections not registering

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Try to open the back cover, then remove the rubberized plate into electronic plate or pcv, clean the backside put an electronics fluid cleaner and wipe it with cotton next the plate or pcv, repeat the same method, after that closed it and try

Posted on Oct 17, 2008

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Posted on Jan 02, 2017

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1 Answer

The calculator turns on but I does not respond to any of the keys on the pad.


then it is time to replace it with a new one . sorry but know of no place that repairs keypads

Aug 18, 2015 | Office Equipment & Supplies

1 Answer

I have a Casio fx 991ES and I'd like to have my answers in surd form instead of decimals how is that possible


Select the Math input/output mode by pressing SHIFT [SETUP] 1.

[SETUP] is the shifted function of the MODE key, located just right of the round cursor pad.

Jan 01, 2014 | Office Equipment & Supplies

1 Answer

Not registering when I press the 2nd key


The 2nd key is not supposed to register anything. It puts the calculator in a waiting state until you press a valid key.

Nov 27, 2013 | Texas Instruments TI-89 Calculator

1 Answer

How to graph


How to graph a function
Look for a key labeled Y= ( the y= editor) and press it. Use the key pad to type in the right side of the function.
Press Graph to display the graph.
If drawing is out of range set the window parameters. Alternatively (if there is a zoom key) use it to select a ZoomIn, a ZoomOut , Zoom Standard.

Mar 23, 2012 | Sentry CA 756 Calculator

1 Answer

Hi dear I have big problem with install class pad Manager because when I want to run it, this program want key install then I put the original key install the program said its invalid key. Please help...


Maybe you made a mistake entering the key. Maybe the key is aingle license key and your activation may not be the first one. Maybe..., I really do not know. However, you can go to the Casio World site and download a version limited to 30, 60 or 90 days. Some older versions of the ClassPadManager still exist on the Internet, and are valid for 180 days. You may go to PlaneteCasio.com to download a copy. Sorry, the site is in French.
You can also contact Casio regarding the invalid key message.

Aug 11, 2011 | Casio ClassPad 300 Calculator

1 Answer

TEC MA-1650 Cash Register It appears the register has been put into a sub programming mode somehow and we are unable to get register functional again. When Register is switched to Set there is a P...


Perform a status clear.
turn key to blind(must be S key not mgr key) while holding zero key down turn reg on with power switch on right side.
reg will beep once & print reciept saying status clear.
this wil not clear programs or totals.

Dec 12, 2010 | Office Equipment & Supplies

1 Answer

Can't figure how to store and recall numbers in memory. fx-115ES


To store a number in a register, press SHIFT [STO] and then one of [A], [B], [C], [D], [X], or [Y] naming the register. To recall a number from a register, press RCL and then the name of the register.

There's also a register M. You can add to the value in M by pressing M+, subtract from the value by pressing SHIFT [M-], and recall from M by pressing ALPHA [M]. The key is just above the AC key.

Dec 07, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Sharp ER-A330 cash register. Have to enter Cashier # every sale.


You might need a special key to program this change, but try this:
  1. Turn the key to PGM
  2. Enter 9910 . @/FOR CA/AT
If you don't get an error, you're done. Turn back to REG sign on one more time, and try two or more sales in a row.

If you get an error, this kind of programming is disabled in PGM mode. you may have to take it to a Sharp dealer who has a Service key. Your MA (Manager) key can get you to any position marked on the Mode Switch, but the SRV key goes to two more unmarked positions beyond PGM. If you have that key or find a dealer who has, turn it one notch past PGM (to 7 o'clock position).
Enter 910 . @/FOR CA/AT
[Yes, it's a different number than in PGM mode.]

If you ever want to make cashier entry compulsory again, do the same thing, except enter 100 just before touching the CA/AT button.

The reason Sharp doesn't pass SRV keys with its registers is that you can totally mess up your register if you make mistakes with this key. Don't experiment with it, or your only hope may be to wipe all machine memory to get it working again.

Sep 29, 2009 | Monroe 2020Plus Calculator

1 Answer

My royal cms487 plus cash register keeps malfunctioning after I reprogram it. I have the manual and follow the instructions, but it won't always allow me to do a full system clear. When it does allow it I...


Unplug register, put in program mode, hold down C key and plug in register while holding. Now you can turn key register mode. This should clear it. I just read it on another site and it worked for me!

Mar 04, 2009 | Royal X3 Calculator

1 Answer

Keys not working


same thing happened to me except its 7 4 and 1 along with the "apps" "sin" and "," keys and it just registers as a 0. ( when i press those keys it puts in 0 on screen)

Aug 25, 2008 | Texas Instruments TI-84 Plus Calculator

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