Question about HP 48gx Calculator

1 Answer

Hp48gx is autistic

My hp48gx had been stored for a long time, perhaps without batteries. I put new AAA batteries. When I turn on my hp, nothing! Sometimes, I can turn on it, with "ON" and "C" simultaneously. In this case some keys on the left seem to act; the keys on the right do not act.
Example: to do: "4, enter, 5 enter", I must do " 4 "A_enter (similteanously)"; 5 A_enter"
If I want to do "96 enter " it is possible with " C_9, C_6, C_enter (or A_enter)"
It is not possible to do "4 enter 5 enter *", the key "*" is mute
The "reset" is without effect. ???????????? Thank you

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  • HP Master
  • 7,993 Answers

Hello,
The following procedure valid for the 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.

Posted on Nov 07, 2009

  • k24674 Nov 08, 2009

    If calculator requires repairs,



    There is an HP customer self repair (CSR) which you can
    contact. On the site it is said 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.




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RAM card batteries:
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Hi imagenius1,

You need to free up some memory. Try clearing your RAM memory. Your calculator should operate properly afterward.

Press [2nd] [MEM] [7] [1] [2]

If the steps above did not reset the memory to your Ti 83 family calculator try the procedures below.

Please be prepared to re-install the calculator's OS if you run through this process.

If you have a straight Ti 83 without the Plus or, Silver Edition label goto (Procedure 2) below. If your Ti calculator is a Ti 83 Plus or better goto (Procedure 1).


(Procedure 1).

  1. Try a new set of AAA batteries.

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  2. Steps to re-installing the operating system:
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  3. Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.

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(Procedure 2).


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  1. Try a new set of AAA batteries.



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Hello Francisco from the land of Pablo Neruda and Salvatore Allende!! Salud.

Try the following procedure (valid for the HP 48G should work for the HP48GX.) If any of the tests fails the calculator requires service
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.

PS Except for a few minor errors in capitalization ( the pronoun I should always be capitalized), the occasional missing pronoun (I), and the adjective which is invariable (no agreement with a plural noun), I would say that your English is fantastic. It is better than the BROKEN ENGLISH written by the vast majority (95%++) of the human race, native speakers included.
I wish my Spanish were as good as your bad English.

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