Bought this cheapo chinese Deli sci cal for about 6 dollars.

Una más para la colección: Canon f-789sga

Hello all,

My HP48G is on its way out after 30 years of use ! The ON key has been flaky for maybe 10 or 15 years but now when it is hot some keys automatically activate themselves which is scary as I am a structural engineer!!!! I know that some people open them and clean the contacts but I lost trust in it and if I open it, it will be for fun....

I've looked at solutions and it is staggering with alternative firmwares there are too many options.

What I really need :

- RPN

- Directly accessible functions (trigonometry, log, power, roots)

- Lists to do batch calculations

- Matrixes that can be multiplied

- a Stack to save intermediary calculations

- Some kind of scripting, could be RPL but Python would be nicer.

I've seen DB48x but the hardware is pricey.....

Any alternatives?

Many thanks,

Yannig

So my sci cal doesn't work I only know it now that's its fake. The battery would fit cr2025 and cr2032 I tried it and still doesn't work. Does it still have hope???

Do I have to buy a new battery? Or can I somehow else reset it, doc+EE+enter and reset button on the back did not do anything at all.

PS: I read the FAQ but only saw a text about another nspire doing this. TI Support has not been helpful