Question about Casio FX-300MS Calculator

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Figures are not coming clearly in the screen

My battery is ok ,may be some problem in the circuit,how to solve.Help me
thanks
kaushik

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Hello,
Before jumping to the worst case scenario, try first to determine if fresh batteries will not solve the problem.
Hope it helps.

Posted on Sep 25, 2009

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1 Answer

Can not get it to start up after putting in all five new batteries. screen is full of wierdness but will turn on/off.


Hi,
Where that ''weirdness'' is coming from, I cannot say, but you can press the CLEAR key to clear the screen. Reset the calculator Ram.
Press [2nd][MEM][7:Reset][1:All Ram][2:Reset][ENTER]. Press [CLEAR] to erase the "Ram Cleared" message.

Make it a habit to exit thid-party programs/games after each use. They have a tendancy to get stuck in RAM, thus preventing you from using your calculator.

Hope it helps.
Thank you for rating the solution.

Dec 07, 2009 | Texas Instruments TI-83 Plus Calculator

2 Answers

My HP 48G does not come on.


Hi,
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 begining 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 left rubber pad 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 dagnostic 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. 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.-

For repairs
There is an HP customer self repair (CSR) which you can contact. On the site it is sais that the service is available for products under warranty or on contract. but you have nothing to lose by contacting them. Here is the link to the web site

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

Hope it helps and Thank you for using FixYa.
Do not forget to rate the solution.

Nov 29, 2009 | HP 48gx Calculator

1 Answer

I own a TI-83 Plus that just quite one day. I replaced the battery and still nothing. The display never recovered. Between my son and daughter and I this is the third TI-83 Plus that has had power circuit...


Hello,
When you change the batteries the display reverts to default setting. My optimistic guess is that the screen display is so light that you cannot see anything on it. This can be arranged.

A Try this before thinking of repairs.

  1. Push the ON button.
  2. Even if you see nothing, press the [2nd] key and release it.
  3. Press and HOLD the UpArrow key until the screen darkens.
  4. You may have to keep pressing UpArrow for a little while before you see anything.
B If that does not work
  1. Remove one of the AAA batteries.
  2. Press and hold the [CLEAR] key.
  3. Whileholding [CLEAR], reinsert the AAA battery and then
  4. turn the calculatoron.
  5. The calculator should display the message "RAM Cleared".
  6. Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".
C. Third option

  1. Remove batteries including the backup battery for 5minutes.
  2. After the 5 minute period, reinsert all of the batteries and
  3. turn the calculator on.
  4. Adjust the contrast if necessary.
D. Last option

The last option requires the reinstallation of the system. So to use it you must download the TIConnect 1.6 software from education.ti.com. You must have the TI USB SilverLink or the TI Black serial cables ready.You must be connected to the Internet.
  1. Remove one of the AAA batteries.
  2. Press and hold the [DEL] key.
  3. Whileholding [DEL], reinsert the AAA battery and then
  4. turn the calculatoron.
  5. The calculator should display "Waiting...Please install calculator software now".
  6. Connect the TI Connectivity cable between the computer and the calculator.
  7. Click on Start >> Programs >> TI Tools >> TI Connect >> TI OSDownloader.
  8. Follow the on-screen directions to reinstall the calculator's OS.
Ifthe message "Error! Press any key to turn unit off. Then turn unit backon." appears on the graphing calculator, quickly, remove one batteryfrom the calculator and reinstall it while the transfer is taking place.

If all else fails you can contact Texas Instruments at ti-cares@ti.com

Hope it helps.
Thank you for using FixYa.

Nov 19, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

Screen is normal but when i type something in it goes blank.


Hello,
I suspect the batteries are depleted. Change the main batteries.
If that does not solve the problem, apply the following procedure.

When you change the batteries the display reverts to default setting.

A Try this before thinking of repairs.

  1. Push the ON button.
  2. Even if you see nothing, press the [2nd] key and release it.
  3. Press and HOLD the UpArrow key until the screen darkens.
  4. You may have to keep pressing UpArrow for a little while before you see anything.
B If that does not work
  1. Remove one of the AAA batteries.
  2. Press and hold the [CLEAR] key.
  3. Whileholding [CLEAR], reinsert the AAA battery and then
  4. turn the calculatoron.
  5. The calculator should display the message "RAM Cleared".
  6. Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".
C. Third option

  1. Remove batteries including the backup battery for 5minutes.
  2. After the 5 minute period, reinsert all of the batteries and
  3. turn the calculator on.
  4. Adjust the contrast if necessary.
D. Last option

The last option requires the reinstallation of the system. So to use it you must download the TIConnect 1.6 software from education.ti.com. You must have the TI USB SilverLink or the TI Black serial cables ready.You must be connected to the Internet.
  1. Remove one of the AAA batteries.
  2. Press and hold the [DEL] key.
  3. Whileholding [DEL], reinsert the AAA battery and then
  4. turn the calculatoron.
  5. The calculator should display "Waiting...Please install calculator software now".
  6. Connect the TI Connectivity cable between the computer and the calculator.
  7. Click on Start >> Programs >> TI Tools >> TI Connect >> TI OSDownloader.
  8. Follow the on-screen directions to reinstall the calculator's OS.
Ifthe message "Error! Press any key to turn unit off. Then turn unit backon." appears on the graphing calculator, quickly, remove one batteryfrom the calculator and reinstall it while the transfer is taking place.

If all else fails you can contact Texas Instruments at ti-cares@ti.com

Hope it helps.
Thank you for using FixYa.

Nov 16, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

I've changed the batteries a couple times but the screen wont clear and wont work.


Hello,
First verify tha batteries are inserted correctly.
Press [CLEAR] or [2nd][QUIT] to interrupt any program hung in memory

The screen contrast may be too light. To darken it.
1.Press [2nd] key and release it
2. Press [UpArrow and release it.
3. Keep repeating steps 1 and 2 in sequence till screen is dark.

To lighten it
Do as above with [DownArrow] instead of [UpArrow] in step 2

To reset RAM
Press [2nd][MEM][7:Reset][1:All RAM][2:Reset] [ENTER] then [CLEAR] screen.

Use communication software (TICONNECT) to communicate with calculator. You will find the software at education.ti.com.

Hope one of the suggestions solves your problem.

Sep 27, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

Texas Instruments TI-30XA Calculator Problem


Either battery is dying, or circuit board has gone, or connector cable loose.

You can replace battery by removing 6 screws at back of calculator, but cost of battery is around 40% of buying new TI-30XA for $10 from Amazon, Staples or elsewhere.

I've used TI-30XA's for years, batteries usually last 2-3 years, then I buy new calculator. The one time I tried to replace battery, fading display still problem, so circuit board had gone bad.

So you could try battery replace and may be OK, but also may be waste of time and $$

Nov 04, 2008 | Texas Instruments TI-30XA Calculator

1 Answer

TI83


Depends on what the black screen is caused by. If you review others on this site some have come up with a methods of keep hitting the 2nd key and left arrow key repeatly w/ success. Just depends. Some had problems because of 3rd party downloads and had to reset and reinstall to clear things up. Some had to connect to the computer and use ti connect device explorer to delete and reinstall even the os software. I guess it just depends on how far you make it to solving the problem. I had them that I couldn't fix or figure out.

Aug 26, 2008 | Texas Instruments TI-83 Plus Calculator

1 Answer

Button Problems


happened to me be4, except all my buttons didn' t work. I just did what people do in movies. throw it aroun, step on it, bang it against walls, desks , ect. Then my teacher took it away. The banging cleared all my ram. It was weird, but it started working.

I think the circuit board moved, and i hit it back into alignment.

May 19, 2008 | Texas Instruments TI-84 Plus Calculator

11 Answers

"RAM Cleared"?


Ok I had this problem all of a sudden and I kinda flipped out, but...I DID FIND A WAY TO FIX IT, all i was hit it against my pillow and bed for like 5 secs and it suddenly worked again. lol its a miracle! But try it and u never know..it worked for me.

( O yea, make sure its on the "Ram Cleared" screen, then beat it against your bed or something soft)

Jan 08, 2008 | Texas Instruments TI-84 Plus Silver...

2 Answers

Ti 83


Remove one of the AAA batteries. Press and hold CLEAR while reinstalling the AAA battery. Continue holding CLEAR button and press ON. Release buttons and press CLEAR again.

Jan 02, 2007 | Texas Instruments TI-83 Plus Calculator

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