Question about HP 20s Calculator

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My HP 20S has 'BEGIN' on the display, how do I get it off?

My batteries were low, so my calculator was acting funny. I put new batteries in, and now I have 'BEGIN' on the display. I just want to perform general functions for now out to 4 decimal points. How do I get rid of this?

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Click the link below to get instructions to reset your calculator... http://h10025.www1.hp.com/ewfrf/wc/document?docname=bpia5294&cc=us&lc=en&dlc=en&product=60738&dlc=en&lang=en

Posted on Jul 25, 2007

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Posted on Jan 02, 2017

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1 Answer

My TI-83+ is acting funny. Sometimes the display works and sometimes it doesn't. What could be wrong and how do I fix it?


maybe there is a bad connection from the battery compartment to the main circuit
you can open the calc and check the connectivity
hope it will help

Oct 22, 2010 | Texas Instruments TI-83 Plus Calculator

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HP12c showed expected display for low battery (star in lower left), put new batteries in and could not get any display at all. Took betteries out of mine (working great!) and now the one not working shows...


Resetting the calculator using the keyboardThe easiest reset is done from the keyboard. To reset the calculator, follow the procedures below in the order presented.
  1. Press ON to turn off the calculator.
  2. Press and hold [ - ] .
  3. Press and release ON .
  4. Release [ - ] .
  5. The screen will display “Pr Error
  6. The calculator will reset to the default settings, and the memory will be erased.

Aug 04, 2010 | HP 12c Calculator

1 Answer

Hp20s has locked up


Hi,
If the calculator has locked up you should perform a reset.
  1. Press and hold the [C] (ON/OFF) key
  2. Press and hold the [LN] key (third key from the left on the top row).
  3. Release both keys simultaneously. T
  4. The calculator should display "0.00" (if the number of decimal places is set to two.)
If that does not bring it to life you should perform a full memory reset

  1. Press and hold the [C] (ON/OFF) key.
  2. Press and hold the first key from the left ( the Square root x key) and the first key from the right (the SIGMA+ key ) on the top row.
  3. Release all three keys at the same time.
  4. Calculator should display "ALL CLr".
  5. To clear the message press the [C] (ON/OFF).
  6. The calculator should display "0.00."
If the calculator does not respond as expected,
  • Remove the batteries, and
  • with a metallic coin (and what coin is not metallica) short-circuit the calculator's electrical terminals.
  • Maintain the coin for about ten seconds.
  • Replace the batteries (preferably fresh ones) respecting the diagram inside battery compartment.
  • The Calculator should display "ALL CLr".
  • To clear the message press the [C] (ON/OFF).
  • The calculator should display "0.00."
If the calculator does not respond to the foregoing procedures, remove the batteries and leave them out of the calculator for 24 to 48 hours to drain capacitors.

If it continues to malfunction, it will need to be repaired. One repair shop in Pennsylvania, USA has a website at http://www.fixthatcalc.com. You should contact them.


Hope it helps.
Thank you for rating the solution.


Nov 05, 2009 | HP 20s Calculator

1 Answer

Has new battery and wont turn on


Hello, You can try to perform the self-test. Procedure is as follows. To perform the self test on units with two batteries:
  1. Turn the calculator off.
  2. Press and hold the c01788482.jpg and c01774569.jpg keys; keep both keys held down for the next step.
  3. Press the c01788481.jpg key so the c01788483.jpg and c01788481.jpg keys are held down simultaneously.
  4. Release the c01788481.jpg key.
  5. Release the c01788482.jpg key, followed by the c01774569.jpg key. The main test screen displays the following: '1.L 2.C 3.H'.
    • Press c01788484.jpg to perform the LCD test (all LCD segments will be turned on). Press any key to exit.
    • Press c01788485.jpg to perform the checksum test and see the copyright messages. Press any key to go from one screen to the next until the main test screen, '1.L 2.C 3.H', is displayed again.
    • Press c01788486.jpg to perform the keyboard test. Press EVERY key on the keyboard until all the keys have been pressed at least once. The screen will progressively turn off with each key press. Once all the keys have been pressed and the screen is clear, press any key to return to the test screen.
Press c01788481.jpg to exit the test system. This will also turn the calculator off. If the calculator detects an error at any point, it will display an error message. For the HP 12c financial calculators with one battery, to perform the LCD self test:
  1. Turn the calculator off.
  2. Press and hold the c01788480.jpg key, and simultaneously press and hold the c01788481.jpg key.
  3. Release c01788481.jpg then c01788480.jpg .
  4. After a few moments, all elements of the screen should be displayed. Press any key to exit.
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Nov 02, 2009 | HP 12c Calculator

1 Answer

Low screen display contrast


Adjust the display contrast by pressing and releasing the 2ND key, then pressing and holding the Up key to increase the contrast or the Down key to decrease the contrast.

May 29, 2009 | Texas Instruments Office Equipment &...

1 Answer

How do you reset the ti 84 plus besides taking out the batteries?


Sometimes, your calculator gets into a funny mode. Maybe your sister was using it, and she set it to do parametric equations, and you have no idea what that means but you do know that it isn't behaving normal. Whenever students come to me and complain that the calculator is acting funny, here's what I do.
  1. Hit MEM (you do this by hitting the yellow 2nd key, and then hitting +).
  2. This brings up a menu. Use the down arrow key to scroll to the word RESET and hit ENTER.
  3. You are now asked if you want to reset "all memory" or just "defaults." Either one will generally work. The former is stronger, but it also clears out any games you may have downloaded.
  4. You are now asked if you really want to do this. Tell it that yes, you really do.
This returns your calculator to a sort of pristine virgin state. I don't know what was wrong with it before, but it should be gone now. If that doesn't work, try dumping the batteries out, waiting for a minute or so, and then putting them back.

Feb 14, 2009 | Texas Instruments TI-84 Plus Silver...

3 Answers

Lag + Doesn't shut off... (ti84plus)


the I/O plot matters. If blowing doesn't help, insert a stick or something into it. I had the same problem, and my TI 84 plus had already been extremely unresponsive and slow before, as I fixed the latter problem by blowing really hard into the I/O plot, I did the same to fix the new problem. For many times nothing happened. Then I insert a metal stick into it and gently hit it inside. In a short while, the calc was normal again!! Now my calc even turns on when it's been put off, with its cursor frozen. I simply use my little finger to dig/scratch the plot and see the lovely cursor beating again. PS Having such a funny calc is really bad, but every time you fix it you'll feel good

May 27, 2008 | Texas Instruments TI-84 Plus Calculator

2 Answers

Fading Display


The blinking asterik means low battery. Could be that your replacement batteries aren't full power.

What is really sounds like is a static charge problem though. If you don't have anything stored in memory that you are worried about losing, try taking the batteries out for a full 24 hours. This will let the capacitor drain and performs a static discharge. After 24 hours put working batteries back in.

Dec 19, 2007 | HP 12c Calculator

1 Answer

Weird display problem.....HELPME PLEASE!!!


I had the same problem Jozhy. I fixed it by re-upgrading the OS using the latest version of TiLP (TILP2 version 1.04). When I tried it using the version of TiLP 2 that I had it didn't fix the problem. I understand that the version before the one that was released a few months ago didn't flash the OS correctly. Try it again after downloading the latest program.

Mar 17, 2007 | Texas Instruments TI-83 Plus Calculator

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