Question about HP 48gx Calculator

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HP burn batteries too fast

I left my 48GX out in the rain. I let the thing dry before running it and thankfully turned on fine and worked! However later I found that it went through fresh batteries in a matter of 3 days even though the thing was shut off. Does anyone have a clue what could be wrong? how I can fix it? or who I can send it to to get fixed?

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Re: HP burn batteries too fast

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
Hope it helps.

Posted on Nov 08, 2009

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How can I graph Y=2X+3 on an HP 48GX? Thank you!

Enter the equation as 2*X+3. Make sure that the name of the independent variable X in the equation and that on the INDEP:X line are both Capital letters or both lowercase letters.

Aug 28, 2013 | HP 48gx Calculator

1 Answer

My HP 48GX recently have ((.)) in the display. I thought that is the indicator of low battery. However, I replace battery new several times the same display still appears. Even after turn off...

Somehow an alarm got set. Execute the command ACK once and see whether the indicator goes away.

To enter the command, press and hold the ALPHA key, then press and release the A, C, and K keys in turn, then release ALPHA, and press ENTER. But you already knew that, didn't you?

Oct 25, 2011 | HP 48gx Calculator

1 Answer

HP 48GX Says "DUP Error:

Do you have anything on the stack? The DUP function duplicates the top element of the stack. If the stack is empty then you'll get this error because the calculator can't duplicate nothing.

Aug 22, 2011 | HP 48gx Calculator

1 Answer

When I turn on my 48gx the message: "TRY RECOVER MEMORY?" appears. If I press Yes, nothing happens. If I press No, the screen turns black and sometimes the same message ( Try recover memory) came...

The only other option you can try is remove the batteries for at least 60 seconds in an attempt to reset the microprocessor ic, if this fails! you are further off replacing the unit.

Jun 02, 2011 | HP 48gx Calculator

1 Answer

48GX has been idle for 4 years.Wont turn on. Is there an internal battery that I can replace?

The 48GX runs on three AAA type alkaline batteries. However, if the device was unused that long, the button cells used for backing up the RAM cards may also be depleted, and the calculator will report "low battery" displaying the ((.)) symbol, even with fresh AAA cells installed.

The RAM card mounted batteries are type CR2016.

Main batteries:
  • Remove the calculator battery compartment door by pressing down and sliding it off away from the calculator.
  • Turn the calculator and shake the batteries out.
  • Replace with a fresh set of AAA alkaline batteries. Polarity is marked on the bottom of the battery compartment.
  • Replace the battery compartment door by sliding it back in place.
RAM card batteries:
  • Turn the calculator over and remove the plastic cover over the plug-in card ports (display-end of the calculator).
  • HP recommends to turn on the calculator while replacing the RAM card battery to avoid memory loss. I assume, your HP48GX has no marbles to recover by now anyway, so it does not matter, I guess.
  • Near the left side of the end of the card. you'll find the nail grip in the black plastic battery holder. Use a thumbnail to gently pull out the battery holder. There is one battery in each card (additional cards are options).
  • Remove the old battery from the holder and replace by a new CR2016 button cell. The "+" side of the battery should point into direction of the calculator's front.
  • Re-insert the holder with the new battery and check the RAM card is properly seated still.
  • Close the compartment by sliding back in the cover.

Jan 11, 2011 | HP 48gx Calculator

2 Answers

Spilled beer

Never try to turn on electronics when they are wet because you can cause more damage.

Nevertheless, remove the batteries and dissasemble the calculator. Rinse with water. Use a lint-free swab soaked in isopropyl alcohol to gently remove stubborn grime. Dry with a blow dryer on cool setting. Air dry 2-3 days. Reassemble and test.

Good luck

Apr 11, 2009 | HP 48gx Calculator

1 Answer

Too few arguments appeat when turn on the HP 48gx calculator


This calculator uses RPN (reverse polish notation) not algebraic notation.
If say you want to calculate 12+13, you proceed as follows
12 [ENTER] 13 + : the claculator displays 25
12 [ENTER] 13 x : displays 156

Also if you use a function like sinus or cosinus
12 [ENTER] cos displays the value (depending on the angle unit you are using).

I think you need to read a little more on the RPN before you get accustomed to this way of doing thing. The best reference is your calculator Getting started manual.

Hope it helps.

Jan 18, 2009 | HP 48gx Calculator

1 Answer

Rs 232 port in the HP 48GX

Try A friend of a friend sent his HP 48 in for repairs. You may want to check into them.

Sep 22, 2008 | HP 48gx Calculator

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