Hi,
I have a HP-41CX that turns itself off after only about a minute. Everything else seems to work. Any suggestions?
Thanks
HP-41CX
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10-19-2003, 08:04 PM
Hi, Thanks
10-20-2003, 09:29 AM
Learn to calculate quickly?
10-20-2003, 10:42 AM
I'm no 41 expert, but I believe this has been discussed here recently. If I remember right, it's either bad contact between the keyboard and the cpu board, or it's a bad capacitor on the cpu board. But don't take my word for it. Search the Forum or the Archives -- I'm sure you'll find some recent discussion of this very problem. Good Luck!
10-20-2003, 10:58 PM
I've made a habit, anytime I open a 41 for the first time, of replacing the two electrolytic capacitors with tantalum units. One is a 470 uF @ 6.3 V and the other is a 100 uF at 10 V. I believe the former holds the memory while changing batteries and the latter controls the shutoff time. I had one 41CX that was eating batteries even while shut off, and it turned out to be a leaky 470 uF cap.
10-26-2003, 07:39 PM
Thanks David, |
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