HP Forum Archive 21

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HP41CV Message #1 Posted by Bry Sun on 18 Oct 2013, 12:41 p.m. Usage ? I have a machine and have fitted new batteries. NONEXISTENT is shown Vintage user 70+ !! HELP !!

Re: HP41CV Message #2 Posted by Massimo Gnerucci (Italy) on 18 Oct 2013, 3:48 p.m., in response to message #1 by Bry Sun Welcome aboard! Manuals... Greetings, Massimo P.S. To clear that message just press the "<-" key. Edited: 18 Oct 2013, 3:51 p.m.

Re: HP41CV Message #3 Posted by Bry Sun on 19 Oct 2013, 5:58 a.m., in response to message #2 by Massimo Gnerucci (Italy) Many Thanks. I have manuals but cannot find the procedure for removing NONEXISTENT and using the HP. Please advise

Re: HP41CV Message #4 Posted by Massimo Gnerucci (Italy) on 19 Oct 2013, 6:29 a.m., in response to message #3 by Bry Sun When first powered on the 41C should give you a "MEMORY LOST" welcome. From there you can press <- and see 0.0000 If the first thing you saw after pressing ON was a NONEXISTENT message then something's wrong. You could try to power it off, press <- keep it pressed and push the ON key, then release ON, then <- . You should see "MEMORY LOST". Be warned that this will wipe all memory, if you have programs or data inside, they won't survive. Please try and advise. Also check appendix B Maintenance and Service Massimo Edited: 19 Oct 2013, 6:31 a.m.

Re: HP41CV Message #5 Posted by Bry Sun on 20 Oct 2013, 3:52 p.m., in response to message #4 by Massimo Gnerucci (Italy) Attempted- Memory Lost does NOT appear. Comments ??

Re: HP41CV Message #6 Posted by Dieter on 20 Oct 2013, 4:11 p.m., in response to message #5 by Bry Sun Just to make sure you did not miss something, here's the detailled procedure to clear your 41CV completely: 1. Turn the calculator off. You will see a blank display. 2. Press and hold down the [<=] (left arrow) key. It is the rightmost key in the same row as the big ENTER key. 3. While you still keep the [<=] key held down, simultaneously press and then release the [ON] key with your other hand. 4. Release the [<=] key as well. You should now see MEMORY LOST. 5. Press [<=] to clear this message and see 0.0000 Does this work? Dieter

Re: HP41CV Message #7 Posted by Bry Sun on 20 Oct 2013, 4:18 p.m., in response to message #6 by Dieter Regret Does NOT work. Trying to revive an old M/C

Re: HP41CV Message #8 Posted by db (martinez, ca.) on 19 Oct 2013, 1:08 p.m., in response to message #1 by Bry Sun If there is a ROM in it; take it out while the calc is switched off and try it again. If not: It could still have a program that is trying to auto execute when you turn it on, and it's calling to a ROM or peripheral. It would normally beep though. No matter. Just do a "memory lost" like Massimo says and if that's the problem; it will go away. You gotta start somewhere.

Re: HP41CV Message #9 Posted by Bry Sun on 20 Oct 2013, 4:10 p.m., in response to message #8 by db (martinez, ca.) How do I remove ROM. 70+ user

Re: HP41CV Message #10 Posted by Geoff Quickfall on 20 Oct 2013, 4:54 p.m., in response to message #9 by Bry Sun Hi Bry just had to say that! The CV is a great machine and programming it with elegant routines is better then doing crosswords or sudoka. Location of the ROM modules: Turn off Calc and remove the modules at the north (top) end of the case (see above). Follow Dieters suggestion above, if memory lost occurs, good. The calc is reset. If "nonexistant" occurs it sounds like a memory or internal PCA ROM problem. All is not lost. Remove the batteries and let the calc sit for a few days. Some people accelerate this process by shorting the internal battery contacts in the machine. The far left shorted to the far right. There are a few more procedures but these are the safest. I am saying this as your posting indicates a level of knowledge about the system that is not as technical as some here have. contact me by email geoffqf@telusNOTnet and substitute . for not. So follow the procedures above and see what happens, if nothing email me or post again. cheers, Geoff ps i have to state, make sure the batteries are N size 1.5 volt alkaline. there are 6.0 volt alkalines out there that fit and are used in home security systems. Of course, nonexistant would not show up on the screen, instead smoke! Edited: 20 Oct 2013, 4:58 p.m.

Re: HP41CV Message #11 Posted by Bry Sun on 22 Oct 2013, 7:43 a.m., in response to message #10 by Geoff Quickfall I am saying this as your posting indicates a level of knowledge about the system that is not as technical as some here have. Certainly !!Knowledge is PoorCertainly !![/bold contact me by email geoffqf@telusNOTnet and substitute . for not. [bold]Please explain Message not accepted

Re: HP41CV Message #12 Posted by Geoff Quickfall on 22 Oct 2013, 12:52 p.m., in response to message #11 by Bry Sun Email sent via this posting board so you should have a message now. Also my email is geoffqf@telus(dot)net. Replace the word and brackets: (dot) with a "." period without the quotes. Example: gezzzz@telus.net Geoff

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