(08-04-2019 12:25 AM)RPN_FAN Wrote:  I bought 3 HP 15C Limited Editions new back when they were available in 2012. Over the years, all three have been developing a problem with registering spurious button presses.

What happens is I will press a button one time, but it will register two or even three times. If this is a number I can sometimes notice and correct, but if it is an operator it really mess up my whole calculation. It's very tedious.

It seems likely to happen with any button, perhaps 1 out of every 100 presses. It's just now getting bad enough that I can't really use these anymore.

Because it's happening on all three calculators, I assume others have the same issue. However, I did a search and couldn't really find anything. Am I alone? Any ideas?

Thomas Radtke Wrote:The real problem is the hard coded key time-out value. I suspect every 15C LE will once in a while (every couple of hundred keypresses or so) show double registered entries. They appear real fast, so that a slightly higher value would have eliminated this problem

(08-04-2019 06:32 PM)Harald Wrote:  I suspect the LE is more of a collector's item for most people. I regularly use the original 15c but hardly ever use the LE.

(08-07-2019 04:25 AM)RMollov Wrote:  

(08-04-2019 06:32 PM)Harald Wrote:  I suspect the LE is more of a collector's item for most people. I regularly use the original 15c but hardly ever use the LE.

I share the same view and because I'm not collecting them, I sold my HP15 LE. On the other hand I can hardly imagine someone really uses it for 'real' work.

(08-05-2019 09:28 PM)BobVA Wrote:  Thomas Radtke suggested in this thread

Thomas Radtke Wrote:The real problem is the hard coded key time-out value. I suspect every 15C LE will once in a while (every couple of hundred keypresses or so) show double registered entries. They appear real fast, so that a slightly higher value would have eliminated this problem

...but if it's getting worse there may be another issue? If it's not mechanical wear on the keyboard - which you'd think wouldn't affect random keys - the only other variable I can think of is lower battery voltage, so perhaps try changing the batteries for fresh ones?

(08-09-2019 01:15 AM)Gamo Wrote:  Voyager series almost reach it 40 year mark, hope that HP do the 40 year Anniversary Edition again.

(08-09-2019 01:15 AM)Gamo Wrote:  Voyager series almost reach it 40 year mark, hope that HP do the 40 year Anniversary Edition again.

(08-08-2019 01:59 PM)burkhard Wrote:  Other than some sketchy durability, why would it be hard to imagine anyone using it for "real work"? I've got both a 15C and 15LE. The LE has low use, but works fine. Functionally, it would be fine for "real work", at least until it breaks :-).

(08-09-2019 08:36 AM)RMollov Wrote:  

(08-08-2019 01:59 PM)burkhard Wrote:  Other than some sketchy durability, why would it be hard to imagine anyone using it for "real work"? I've got both a 15C and 15LE. The LE has low use, but works fine. Functionally, it would be fine for "real work", at least until it breaks :-).

Can I ask you what sort of 'real work' today is worth to be done by any hand-held scientific calculator as opposed to all other means available?
I love (HP) calculators and have quite a few of them, but (as a surveyor) I haven't used one for 'real work' for at least 10 years now. Maybe it's different in other fields... Still strongly doubt it. Any smart phone can do so much more.

(08-10-2019 02:51 AM)Archilog Wrote:  Good evening,

I'm using my HP-15c LE just about twice a week, for any calculation a simple 4-operations calculator could do. It is not a REAL WORK as engineers understand that, but I don't care: it is just important for me as a French teacher and school manager - quite far from scientific daily problems.

If I have to do some more sophisticated calculations - yes, it might occur -, well, I have a good choice, from my HP-21 to my Free42 app and even my 48 calcs - I didn't venture into Prime's or Numwork's dominions but who knows?