The Museum of HP Calculators

HP Forum Archive 13

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HP 48SX quit
Message #1 Posted by unspellable on 17 June 2003, 11:26 a.m.

My HP 48SX quit. Now what?

      
Re: HP 48SX quit
Message #2 Posted by Jeffrey_G on 17 June 2003, 12:13 p.m.,
in response to message #1 by unspellable

Buy another one through Ebay or the classified ads here.

Jeff

      
Re: HP 48SX quit
Message #3 Posted by Daniel Webster on 17 June 2003, 2:00 p.m.,
in response to message #1 by unspellable

Ask HP? Ba-boom. But seriously,

  1. Check the batteries.
  2. Try the master reset under the top left foot.
  3. Press on the rasied portion of the bezel above the B and C keys while trying to turn it on.
  4. If none of the above work, repost here or roll the dice of eBay.
            
Re: HP 48SX quit
Message #4 Posted by unspellable on 18 June 2003, 7:29 a.m.,
in response to message #3 by Daniel Webster

Daniel,

Did all that, no luck.

      
Re: HP 48SX quit
Message #5 Posted by Steven Kutoroff on 20 June 2003, 9:14 a.m.,
in response to message #1 by unspellable

Have you tried removing the batteries and any inserted cards, waiting a few hours, and then using the master clear power on sequence? This is what works for mine when it goes brain dead from something I have done. Last time was when I was changing memory card batteries and accidentally pulled the card out with power on. The calculator appeared to be dead. The above sequence fixed it.

            
Re: HP 48SX quit
Message #6 Posted by unspellable on 20 June 2003, 12:25 p.m.,
in response to message #5 by Steven Kutoroff

Not sure what you mean by the master power on sequence.

I've tried leaving the batteries out for a couple of days. Tried the paper clip end in the hole on the back. Tried a couple of reset key procedures. No luck.

The calculator stopped responding to any key strokes including resets and had a frozen display. I took the batteries out and have not been able to turn it on since.

If you reply, please specifiy key sequence as I do not happen to have the manual with me at present.

                  
HP48SX keyboards
Message #7 Posted by Randy Sloyer on 20 June 2003, 7:50 p.m.,
in response to message #6 by unspellable

It sounds like a shorted keyboard. A key that stays closed electrically will lock up any 48 series or Pioneer machine.

Does it get used in a dirty environment? If so, it might clean out with a couple of passes in distilled water in an ultrasonic cleaner.

I have a 48 sized machine if needed, but you'll have to send me the unit as the cleaner stays right here.

Edited: 20 June 2003, 7:50 p.m.

                        
Re: HP48SX keyboards
Message #8 Posted by unspellable on 23 June 2003, 9:50 a.m.,
in response to message #7 by Randy Sloyer

It has been living in an ordinary room environment, not particularly dirty. Keys feel normal. A few months back it got squeezed (while in the soft case) in the hinge of my brief case. Display was funny for a while but straightened out. Looked as if the it had lost connection to a few bars in the zebra strips, but after a week or so it was back to normal. I'm beginning to view it as a candidate for the parts bin. I have some application cards that supposedly will not work with a 48GX so I'll probably have to find another 48SX.

BTW: I have an HP-12C,. no manual, and an HP-11C with a 15C manual, an Casio 7000G w manual, and a TI-83 with manual, if any one is interested in horse trading.

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