Infinite Try to Recover Memory loop
xiel...@gmail.com
I was playing with some of the built in test functions of my 48GX
when it suddenly resetted, giving me a Try to Recover Memory loop
prompt. Pressing yes or no gives me the same prompt back. I have tried
all the different methods of resetting, ON+A+F, Reset hole, removing
the battries. The only thing I have yet to try is to take out the
battries from the calculator and leave it overnight.
The 48GX is unhacked and was in a new (meaning, I just resetted it)
state before I played with the test functions.The test function I used
before the calculator got screwed was the VAR button test, accessed
from the test menu (On+D if I recall) and then pressing the VAR button.
Not sure what those tests does though, only the A-F tests are
documented.
Anyone knows how to get the calculator working again? I'm just
stuck in this Try to Recover Memory loop now.
Thanks!
Avatar_e
John H Meyers
> I was playing with some of the built in test functions of my 48GX
> when it suddenly resetted, giving me a Try to Recover Memory loop
> prompt. Pressing yes or no gives me the same prompt back. I have tried
> all the different methods of resetting, ON+A+F, Reset hole, removing
> the battries. The only thing I have yet to try is to take out the
> battries from the calculator and leave it overnight.
> The test function I used before the calculator got screwed
> was the VAR button test, accessed from the test menu
> (On+D if I recall) and then pressing the VAR button.
> Not sure what those tests does though,
> only the A-F tests are documented.
The HP48 series self-tests are documented at
http://www.hpcalc.org/hp48/docs/faq/48faq-4.html#ss4.7
The tests should not damage the calculator,
and the calculator should recover after ON+A+F followed by "NO"
(this will of course lose anything saved in memory).
If you have any plug-in cards, I would also remove them,
then try again (the backspace key on the HP48 series
does not prevent attempting to configure libraries).
> I'm just stuck in this Try to Recover Memory loop now.
So am I; there is also some extra stuff in my memory
which I'm trying to forget -- can anyone help with that? :)
[r->] [OFF]
xiel...@gmail.com
Thanks people, but that didn't work, I already tried that. I don't have
any expansion cards loaded. Just a plain 48GX that refuses to get out
of the Try to Recover Memory prompt. Doing the backspace thing (I
suppose its that left arrow above the divide button) didnt't seem to
work... appears that reseting via the reset hole leaves the calculator
in the off state. I have to press the ON button to turn it on again,
which doesn't work with the backspace held down. So I'm either doing
something wrong or my calculator's seriously screwed. Does HP still
offer repairs for this? What are the charges like?
Giancarlo
> offer repairs for this? What are the charges like?- Hide quoted text -- Show quoted text -
Hi.
Just quoting from a Joseph Horn's reply to a similar issue on the HP
forum:
<<Just hold down the backspace key DURING a warmstart. That prevents
libraries from attaching, STARTUP from running, and so on.
Warning: You gotta be fast. Press and hold down ON, then tap the [F3]
key and release it, and then release the ON key and IMMEDIATELY press
and hold down the backspace key>>.
You may find helpful to have a look at the thread:
http://forums1.itrc.hp.com/service/forums/bizsupport/questionanswer.do?threadId=1064936
I repeat, full credits to Joe Horn, it's his knowledge and I'm only
dissemintaing information ;)
Hope this helps.
Best regards.
Giancarlo
Veli-Pekka Nousiainen
X
>> any expansion cards loaded. Just a plain 48GX that refuses to get out
>> of the Try to Recover Memory prompt. Doing the backspace thing (I
>> suppose its that left arrow above the divide button) didnt't seem to
>> work... appears that reseting via the reset hole leaves the
>> calculator
>> in the off state. I have to press the ON button to turn it on again,
>> which doesn't work with the backspace held down. So I'm either doing
>> something wrong or my calculator's seriously screwed. Does HP still
>> offer repairs for this? What are the charges like?- Hide quoted text
>> -- Show quoted text -
Hey!
That only works for the HP 48GII & 49-50 series
The old HP 48GX, 48G, 48G+ are different beasts
******************************************************
Giancarlo
On Oct 5, 2:31 pm, "Veli-Pekka Nousiainen" <DROP_...@dlc.fi> wrote:
> Giancarlo wrote:X
>
> >> any expansion cards loaded. Just a plain 48GX that refuses to get out
> >> of the Try to Recover Memory prompt. Doing the backspace thing (I
> >> suppose its that left arrow above the divide button) didnt't seem to
> >> work... appears that reseting via the reset hole leaves the
> >> calculator
> >> in the off state. I have to press the ON button to turn it on again,
> >> which doesn't work with the backspace held down. So I'm either doing
> >> something wrong or my calculator's seriously screwed. Does HP still
> >> offer repairs for this? What are the charges like?- Hide quoted text
> >> -- Show quoted text -Hey!
> That only works for the HP 48GII & 49-50 series
> The old HP 48GX, 48G, 48G+ are different beasts
> ******************************************************
>
>
>
> > Hi.
> > Just quoting from a Joseph Horn's reply to a similar issue on the HP
> > forum:
> > <<Just hold down the backspace key DURING a warmstart. That prevents
> > libraries from attaching, STARTUP from running, and so on.
>
> > Warning: You gotta be fast. Press and hold down ON, then tap the [F3]
> > key and release it, and then release the ON key and IMMEDIATELY press
> > and hold down the backspace key>>.
>
> > You may find helpful to have a look at the thread:
> >http://forums1.itrc.hp.com/service/forums/bizsupport/questionanswer.d...
>
> > I repeat, full credits to Joe Horn, it's his knowledge and I'm only
> > dissemintaing information ;)
>
> > Hope this helps.
> > Best regards.
> > Giancarlo- Hide quoted text -- Show quoted text -
Oooops....
Apologies!
G.
John H Meyers
> quoting from Joseph Horn's reply to a similar issue:
> Just hold down the backspace key DURING a warmstart. That prevents
> libraries from attaching, STARTUP from running, and so on.
That's new for 49-50 series only; doesn't work on original 48S[X]/G[X]
ON+A+F with "NO" (and no cards loaded)
should recover from memory corruption
(bad RAM content, that is, not malfunctioning RAM or ROM).
If the ON+D menu can be re-entered, try self-tests C and D,
which should result in "IROM OK" and "IRAM OK 128K" on 48GX;
anything else indicates internal malfunction.
Is there any junk (or dirt) in the (empty) card slots,
or in the serial port opening?
What else? Take out the batteries and give it a few days' sleep
(shorting the battery contacts won't help much, because of diodes).
According to Craig Finseth (http://www.finseth.com/parts/hpdata.php),
the HP48GX was discontinued on 2003-05-30; that being less than
five years ago, it's always possible that HP (USA) might still
"repair" a 48GX (i.e. sell you another that they've kept in stock
for warranty and other repair), such as this offer made in 2003:
http://groups.google.com/group/comp.sys.hp48/msg/f227565fb9cb3982
Other leads for repair:
http://www.hpmuseum.org/repair.htm [do-it-yourself info and referrals]
http://www.fixthatcalc.com/ [mentioned at HPMuseum]
http://www.fixthatcalc.com/contact.htm
Good luck, xieliwei!
49G [not 48GX] surgery:
http://www.geocities.com/deachp/duda8.html
http://www.geocities.com/deachp/soporte.html
More old pre-LCD 4-bangers than I can count:
http://www.wass.net/manuals/index.htm
-[ ]-
Jean-Yves Avenard
Hash: SHA1
Avatar_e wrote:
> press and hold backspace while booting :D I learn that today here too
>
Won't work on the 48G.
Make sure there's no card in the 48GX. It could be a due to a corrupted
library in one card.
JY
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Jean-Yves Avenard
Hash: SHA1
xiel...@gmail.com wrote:
> something wrong or my calculator's seriously screwed. Does HP still
> offer repairs for this? What are the charges like?
>
If pressing NO makes no difference and you have no expansion cards
plugged into your calculator, I'd say that unfortunately your calculator
is *broken* (or a brick whatever)
Unfortunately, it will also be out of warranty and HP never repaired
those machines, they only replaced it.
Maybe they still have stock for those, but I think you will have to buy
a new machine like the HP50G
JY
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xiel...@gmail.com
Thank you for all the replies! Unfortunately, I have already tried most
of them. The only ones I didn't try, I just tried. When I tried to blow
out any dirt with in the cardslot (with a blower of course), the
calculator went haywire on the next run, at first with the text "Try to
Recover Memory" not appearing, then the buttons jumbled up, then the
screen scrambled, and at last, a infinite loop of beeps.So I blew at
the slot again, and it actually managed to recover and was back to
normal. But I had to be stupid enough to try to run a full self-check
on it. It scrwed up on the J check again (that was how I got this
problem in the first place), and now I'm back to square one. No matter
how much blowing I do to the slot now, it keeps giving me the Try to
Recover Memory prompt. At least now I know the problem liews with the
card slot.
However, on close examination, the slot seems to be totally clear and
there seems to be no short. I called my local HP service center and
they said they do not offer service, not even technical support and the
48GX has passed its product lifespan.
Conclusion: I had to try those self-tests eh? (Slaps myself)
John H Meyers
> When I tried to blow
> out any dirt with in the cardslot (with a blower of course), the
> calculator went haywire on the next run, at first with the text "Try to
> Recover Memory" not appearing, then the buttons jumbled up, then the
> screen scrambled, and at last, a infinite loop of beeps. So I blew at
> the slot again, and it actually managed to recover and was back to
> normal. But I had to be stupid enough to try to run a full self-check
> on it. It scrwed up on the J check again (that was how I got this
> problem in the first place), and now I'm back to square one. No matter
> how much blowing I do to the slot now, it keeps giving me the Try to
> Recover Memory prompt. At least now I know the problem lies with the
> card slot.
>
> However, on close examination, the slot seems to be totally clear and
> there seems to be no short. I called my local HP service center and
> they said they do not offer service, not even technical support and the
> 48GX has passed its product lifespan.
>
> Conclusion: I had to try those self-tests eh? (Slaps myself)
Test "J" is "What's plugged in" [perhaps not by coincidence]
Have you tried "slamming calc on table"? :-)
Or shampoo (Brother Joe's miracle cure :)
http://groups.google.com/group/comp.sys.hp48/msg/e43be0f52af1159a
Or "squeezing the case together"?
Or writing any of those repair people?
Why not give "remove batteries and wait a week,
with ON pressed all the while" another try?
Good luck!
John H Meyers
> I blew at the slot again, and it actually managed to recover
> and was back to normal. But I ran a full self-check on it.
> It scrwed up on the J check again (that was how I got this
> problem in the first place)
Another possibility is that pressing the key may apply pressure
to something else inside which just happens to be underneath
(perhaps circuit board, card connector); had you tried
using the calc before ever running self-tests,
and was anything already wrong?
[r->] [OFF]
xiel...@gmail.com
I heard of all the heart hurting methods of reviving the HP before, a
variant including cleaning with alcohol. I did actually try the hit and
squeeze method, but that didn't work. I won't try the cleaning method
(yet) though, my calculator was to a certain extent working. I'm
thinking of depriving it of batteries next, but anyone got a suggestion
as to how to keep the ON button pressed?
The calculator was working normally before my first fatal self-tests
and before my second fatal self-tests (the one that killed it again).
Before the second self-tests, the calculator seems to be working
perfectly normal, except that it was totally empty (ahh, no tetris :P),
and yes, I don't have backup, my own-made cable stopped working a few
months ago.
I was thinking, if the taking the battery out method doesn't work, is
there a way to disable the card slots? Or maybe I can buy some cards
and keep them permanently slotted in. I guess the calculator believes
there's a card slotted in, but there actually isn't, so it panics?
Any suggestions?
On something off-topic, anyone have plans for making your own cable
again? I seem to have forgotten which wire goes where. Or even better,
is it possible to use the infrared of my laptop to communicate with the
HP?
horsz...@gmail.com
http://www.hpcalc.org/hp48/docs/misc/pclink.txt
Luis
Jean-Yves Avenard
The same problems would have happened even if you didn't use the self tests.
You obviously have a short circuit in your calculator or your RAM chip
is damaged.
JY
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xiel...@gmail.com
Okay, I left the 48GX without batteries for a week and now it's alive
again. The only problem now is that it's practically empty, didn't
the 48GX come with some built in libraries?
I now have a working data cable and just need to find the original
libraries on the net, anyone care to show me the way?
John H Meyers
> I left the 48GX without batteries for a week and now it's alive again.
Henceforth to be known as the "xieliwei maneuver,"
and posted in calc shops wherever emergency rescue
may be called for :)
> The only problem now is that it's practically empty,
> didn't the 48GX come with some built in libraries?
Not that appear in any ports or Library menu,
although *all* built-in functions reside in ROM libraries,
plus there's the "Equation library" and the TEACH command
(the latter creates a directory of sample programs).
> need to find the original libraries on the net
Most of the once-popular 48G[X] libraries
are archived at http://www.hpcalc.org
The cable (and any RAM cards which might still be made)
can come in very handy for backup and library storage.
[r->] [OFF]