Question about HP 48gx Calculator

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Nothing happened - but my 8 year old HP 48G+ seems dead

I was working away when I got a message "Do you want to recover Data?" I said no and the screen went black. I move the batteries around and I can get it to repeat the same message before the screen blackens again. Any ideas?

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  • Trog16 Apr 09, 2008

    I get the message "Would you like to recover the memory?" and if I hit no or yes I get a black screen. I have removed the batteries, and let the calc sit, I have changed the batteries, all to no avail. Hope to get this working again.

    Love the calc,

  • johnsonch Feb 11, 2009

    I have a similar problem. My GX locked up. None of the keys produced a change on the display. I replaced the batteries and the screen went black except for a couple rows of pixels right in the center. And still, the keys are all non-functional (they do nothing)

    Anyone out there have a clue on how to remedy this?



3 Answers

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Flip your GX over. Remove the rubber foot in the upper right corner to find the reset hole. Insert a standard paperclip and hold it there for a minimum of 2 seconds. Flip 'er back over, hit "on" and you should be back in business. You may be promped to "recover data". I didn't have anything I wanted saved, so I just said selected no.

Good luck.

Posted on Feb 11, 2009

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Of course EVERY foot has a hole under it ... only one has an 'R' ... rofl. I was on my way to get the hammer when I thought of the internet!

Posted on Aug 03, 2010

  • CEAI Apr 04, 2011

    Khe-Sanh-Vet ... it's 2011-04-04 ... and today I used your suggestion to fix my HP48GX calculator ... IT WORKED GREAT .... As a further comment I wanted to express a solemn Henry V "Band of Brothers" thanks to you, especially for your service and sacrifice during the Seige of Khe Sanh ... where you and your comardes broke the back of the N.V.A. ... well done, Soldier ! CEAI@Engineering-Excellence.US ...


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Johnsonch was right on the money!!! Thanks! You just saved me $100 or whatever hp48g's are going for.

Posted on Apr 29, 2009

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Posted on Jan 02, 2017

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no country stated or if not usa what is your line power?(volts AC)
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12 year old monitors, found, (dead)
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see those 4 cream colored connectors bottom of this PCB
those are the high voltage CCFL lamps.
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