HP Forum Archive 21

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BATTERIES' SWAP ON HP 48GX Message #1 Posted by aurelio on 6 Oct 2013, 8:02 a.m. Yesterday evening I got a problem with my 48GX. After the prompt of a low battery message I removed the rechargeable batteries to charge them. 1) I've noticed that the annunciator of the "low battery" alarm was still on the display (without any battery inside ) and I thought : "this is due to the backup battery" (isn't it?) this morning the display was clear 2) after the carge I replaced the batteries and turned on the calculator but the only result is tho see the "low battery" annuciator on 3) I replaced the rechargeable with three new fresh cells and the problem is the same..... Where am I wrong? Thank's in advance PS. I've googled without to find this issue, if it is well known behaviour that I don't know, excuse me for that

Re: BATTERIES' SWAP ON HP 48GX Message #2 Posted by Han on 6 Oct 2013, 8:35 a.m., in response to message #1 by aurelio Do you have a memory card installed? Usually the low-bat message indicates where the low battery is: (S) for system (main batteries), (P1) for the card in port 1, and (P2) for port 2.

Re: BATTERIES' SWAP ON HP 48GX Message #3 Posted by aurelio on 6 Oct 2013, 9:49 a.m., in response to message #2 by Han No Han, anymemory card, but what I mean that the calculator does not turn on....just shows the alarm annunciator! Edited: 6 Oct 2013, 9:49 a.m.

Re: BATTERIES' SWAP ON HP 48GX Message #4 Posted by Thomas Radtke on 6 Oct 2013, 10:06 a.m., in response to message #1 by aurelio Can you measure the voltage (fresh batteries inserted, calculator turned on)? Maybe there's a shortage (capacitor comes to mind).

Re: BATTERIES' SWAP ON HP 48GX Message #5 Posted by aurelio on 6 Oct 2013, 10:36 a.m., in response to message #4 by Thomas Radtke 4,70 V Thomas

Re: BATTERIES' SWAP ON HP 48GX Message #6 Posted by Thomas Radtke on 6 Oct 2013, 11:00 a.m., in response to message #5 by aurelio That obviously destroys my theory. Sorry, that was just a guess, I hope someone else has a solution for you.

Re: BATTERIES' SWAP ON HP 48GX Message #7 Posted by R Nav on 6 Oct 2013, 11:52 a.m., in response to message #1 by aurelio Long shot but try this... http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=301

Re: BATTERIES' SWAP ON HP 48GX Message #8 Posted by aurelio on 6 Oct 2013, 7:50 p.m., in response to message #7 by R Nav Just now back home, nothing, just the annunvciator is shown on the display EDIT: just now solved it was just a resetting matter, found the link below thanks to Randy who explained where the hole is located Ciao a tutti and thank-you very much Edited: 7 Oct 2013, 3:06 a.m.

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