Question about Texas Instruments TI-83 Plus Calculator

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Funny Screen/Won't Turn on...

When I turn my calculator on I get a funny symbol in the top right corner and it doesn't go away no matter what I do. I've pressed 2nd and quit, I've hit clear, I've taken the batteries out for 15 minutes (including the lithium one). I've held the clear button and taken one of the triple A batteries out... I've never installed my calculator on the computer nor do I have a USB cable for it... the RAM cleared will come up randomly every once in a while and sometimes the calculator won't turn on at all and I will get a screen full of random pixles. I don't know what to do. HELP.

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  • Anonymous Feb 27, 2008

    show black lines

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There is a small line in the upper right corner of my screen when i turn on the calculator. then if i do multiple operations, lines and distortions appear on the symbols on the screen. these distortions...


The normal cursor is a solid rectangle. To clear the RAM, press [2nd][MEM] to open the Memory Management tool. On theat screen select [7:Reser][1:RAM][Reset¸

Jul 14, 2011 | Texas Instruments TI-83 Plus Calculator

2 Answers

One of my students got an error message when trying to input simple exponential equations to graph. When I looked at his "y=" page, I found that instead of a / before each y, there is something...


In the y= screen, move to the line in question. Press left-arrow repeatedly to get to the funny symbol. Press ENTER repeatedly to cycle through the various graph styles.

Dec 08, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

I haven't turned on my HP 48GX calculator for more than 1 year and I cannot turn it on now even I change the new batteries. I hope you can help me, thanks.


It may just be a matter of adjusting the contrast of the screen.
Make sure batteries are good. Press and HOLD the ON key. Press + to increase contrast OR - to dim the screen.
At the end of the post you will find a link to a repair shop, but first I suggest you perform the following tests.

Warning
In the keyboard test (below), make sure the keys are pressed in the right order. If the calculator fails the keyboard test then it needs repairs. (Ignore the beginning of the post and skip to the last part For Repairs )

You can reset the calculator:

Turn the back of the calculator towards you. Extract the top right rubber pad (when you are looking at the back of calculator ) on the back of the calculator and use a paper clip to press the Reset button. If that does not restore the calculator to health, you should perform the diagnostic tests.

Make the calculator perform a
Self test.
  1. Turn calculator on
  2. Press and HOLD the key [ON]
  3. Press and release the key with "E" to its right (the one before last in first row)
  4. Release the [ON] key.
It tests the RAM and ROM. You will see various patterns on screen. Afterward you should see
IROM OK,
IRAM OK,
HP48GX OK
The self test will continue repeatedly until you perform a
System Halt
  1. Press and HOLD the [ON] key
  2. Press and release the "C" key
  3. Release the [ON] key.
The empty stack should appear.

If you do not see IROM OK and IRAM OK, the calculator requires service.

If the above procedure is successful, you may want
to test the keyboard.
  1. Turn calculator on
  2. Press and HOLD the [ON] key
  3. Press and release the "D" key.
  4. Release the [ON] key
  5. Press and release the "E" key. KBD 1 should appear on the top left corner of the screen.
  6. Starting at the upper left corner of the keyboard, and moving Left to right, press every key in sequence. If you follow the sequence and the keys are functioning properly you should hear a high pitch sound at each press.
  7. If everything is OK, when you press the last key (+) the screen displays KBD 1 OK.
To exit the keyboard test proceed as described above under System Halt.

If you follow the proper sequence and a hexadecimal number appears after pressing a key, the calculator requires service.-

For repairs
You can also try this site. They do repairs on most models, except the newer ones.

Aug 24, 2010 | HP 48gx Calculator

1 Answer

It wouldnt turn on new batteries are in it. Screen funny


Is the screen funny like it's telling jokes? Or is it falling down funny? Im not sure, but if its dimly lit funny or too dark funny try this: hit the second key and then hold down up. This will darken the screen. If its too darkthen hit the second key and the press down.
Good Luck; Wish my calculator had a sense of humor.

Jun 21, 2010 | Texas Instruments TI-83 Plus Calculator

2 Answers

When I turn the calculator on, I get a black screen. It won't go away.


Most likely the screen contrast is too high. Try to lighten screen
Press [2nd] key and release it
Press and Hold [DownArrow] until screen lightens to your liking.

As you keep pressing DownArrow, the top right corner shows a number that decreases as the screen lightens.

Dec 15, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

I just changed the battery in my HP 48GX that I haven't used in some time, but the alert symbol is on and nothing else is happening


Hello,
The following procedure valid for the HP 48G should work for the HP48GX.
Make the calculator perform a
Self test.
  1. Turn calculator on
  2. Press and HOLD the key [ON]
  3. Press and release the key with "E" to its right (the one before last in first row)
  4. Relaese the [ON] key.
It tests the RAM and ROM. You will see various patterns on screen. Afterwards you should see
IROM OK,
IRAM OK,
HP48GX OK
The self test will continue repeatedly until you perform a
System Halt
  1. Press and HOLD the [ON] key
  2. Press and release the "C" key
  3. Release the [ON] key.
The empty stack should appear.

If you do not see IROM OK and IRAM OK, the calculator requires service.

If the above procedure is successful, you may want
to test the keyboard.
  1. Turn calculator on
  2. Press and HOLD the [ON] key
  3. Press and release the "D" key.
  4. Release the [ON] key
  5. Press and release the "E" key. KBD 1 should appear on the top left corner of the screen.
  6. Starting at the upper left corner of the keyboard, and moving Left to right, press every key in sequence. If you follow the sequence and the keys are functioning properly you should hear a hight pitch sound at each press.
  7. If everything is OK, when you press the last key (+) the screen displays KBD 1 OK.
To exit the keyboard test proceed as described above under System Halt.

If you follow the proper sequence and a hexadecimal number appears after pressing a key, the calculator requires service.
Hope it helps.

Nov 07, 2009 | HP 48gx Calculator

1 Answer

TI 84 plus calculator, flashing dot in upper left hand corner


Hello,

When you turn the calculator on, its screen is cleared, save for a small square on the top left corner. This is the cursor and it is blinking: The calculator is waiting for you to order it to perform some calculation.

Try this simple operation
[1] [+] [1] [ENTER]. The calculator will display the result one line down justified to the right.

Hope it helps.

Aug 26, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

Problem with Caculator


You can download the manual from http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=DownloadDetailTabAct&fcategoryid=346&modelid=15431

Jun 08, 2009 | Canon P23-DH Calculator

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

How do I turn off the Print function?


Press the '2nd' button, press the 'M+' button. 'NP' should appear on the display screen, and print function will be turned off.

Oct 22, 2007 | Sharp EL-1701C Calculator

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