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devel / comp.sys.hp48 / Re: HP 48SX does not switch on

Re: HP 48SX does not switch on

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https://www.rocksolidbbs.com/devel/article-flat.php?id=33&group=comp.sys.hp48#33

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Subject: Re: HP 48SX does not switch on
From: john.finley@gmail.com (John Finley)
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by: John Finley - Sun, 23 May 2021 03:21 UTC

On Wednesday, April 10, 2019 at 11:00:04 AM UTC-5, severin....@gmail.com wrote:
> torsdag 21. januar 2010 16.23.36 UTC+1 skrev Marck følgende:
> > Hi all,
> >
> > I pulled out of the box after many years my HP 48SX which is in perfect
> > conditions...except for the fact that it doesn't switch on!
> > Of course I put 3 new batteries in it.. but nothing happens. Does
> > anybody know if I can perform some little tests to try to understand
> > what's happening and fix the problem?
> >
> > Many thanks to all of you.
> > Marck
> press the area under the display and press on at the same time. that did it for me.

Just a note of confirmation: I pulled my dad's 48SX out of storage, put new batteries in, and could not get it to turn on with the reset (under top right foot), with ON/+, ON with any top row keys, reversing batteries briefly, holding reset a long time... what worked is pressing between display and top row of keys while I press ON. It turns on, but many key presses don't work unless I'm also pressing below the display (e.g. I can enter numbers and press ENTER, but none of +/-/x// work unless I press up there, then can't turn it back on.

I get an audible "click" when I press there, like there's something sticky, some goo. I might open it up, but just knowing what ails it might be enough for now (15C works the day job).

Subject	Author
Re: HP 48SX does not switch on	John Finley