Hi, I have a VERY old Casio calculator (title), which used to belong to my father. Here are its conditions:

- Screen is potentially damaged; there is some burn in on the lcd. The cables are also somewhat damaged, since there was duct tape all over them.

- Case is heavily worn down, but not broken.

- Speaker is starting to rust; looking for replacement but not a priority for the moment. Wires fell off due to rust. (I can't even get the speaker off the back...)

- *All* the screws are stripped.

- PCB is in almost perfect condition; but the speaker pads are slightly burnt due to a failed speaker wire replacement. (My fault ^^;)

So my questions are the following: does anyone know if there are official measurements for the screws used? if so, could I have them so I can get them made or something? ; Is the screen cable possible to be replaced?

I ask here because, although I have found the Service Manual for the FX-850P, I don't know if they are compatible with the FX-880P, and since I don't have access to a lot of money, I'd rather stay safe. Even then, the screws are marked as "No stock recommended", and I don't know if it means it's not safe to purchase or something...

Thanks in advance.

Hello guys, before reading, give feedback to try to put this at the top so that many more people can read it, please!!

To be able to use the software you need 2 things: Windows feature "Sandbox" and the "TI-Nspire computer link" software (this is completely free and can be downloaded from the Texas website).
The sandbox allows you to simulate a PC inside yours, it is a feature that can be activated. After activating and starting the sandbox, inside the virtual PC you install the "TI-nspire Student Software" from texas site, install it and select the 30 day license. After that you already have access to the calculator software and can do whatever you want, after that send the file to the email. Return to the real PC, and use the "computer link" to transfer to the calculator.
Whenever you close the Sandbox all data will be deleted, so you need to instal the software the next time you open the sandbox. But you will also have those 30 days again!!

I hope it was useful!!

has anyone had a problem like this and managed to fix it?

Hey! I need to figure out how to get reimann sums on my casio calculator. I had ai generate the needed code to program it but everytime i try to run it i get a syntax error. any chance anyone can help? I can provide the program I have right now and see if i am the one with the issue? I have a casio fx 9750 GIII.

Hey there! I need help pleaseeee. I need to figure out how to get reimann sums on my casio calculator. I had ai generate the needed code to program it but everytime i try to run it i get a syntax error. any chance you can help?

Hey, I'm looking for some help finding a reasonably priced RPN scientific calculators. I would like it to be a smaller form factor too. Just wondering if any of you had some good ideas, thanks!

Hi, I have had a TI-84 Plus CE for a few years, and it has worked with no issues. However, today I was trying to compute a definite integral from 0-60 degrees for sin(x)dx and it was giving me 28.64788976 instead of 0.5. I made sure that “Degrees” is chosen in Mode. Does anyone have any suggestions as to why this isn’t working?

Hello everyone,

I didn't know there was a subreddit for calculator enthusiasts! I came across it while trying to decide what to do with my old financial calculator.

So I think you are the best group of people to ask this question to. What do I do with it?

I can think of three options:

- Donate it. A university in my city loans equipment to students who can't afford to buy them. But, since the HP 19BII is very old, not sure they still use those?

- Recycle it. It was very expensive at the time but it's just gathering dust.

- Sell it. I wouldn't have thought of it until I saw that there are actual calculator collectors out there. Maybe one of you wants it?

Any advice would be greatly appreciated.

https://preview.redd.it/kjg6xi8m4b4e1.png?width=309&format=png&auto=webp&s=a210be62b555144240796a2940d852ea70ef5435

So basically iam trying to 5.8 ∠ 59 degrees and its not working. it says error. How can I switch between polar and rectangular form while the calculator is on degree mode so I can get the right answer. Is there anyway to program in this ∠ symbol as I do know that u can program some python on the TI 84+?

hi everyone, I'm doing my masters in the UK and have been told I need to get a calculator from the list mentioned below. I'm having trouble choosing which model to get (and how they are all different) as well as where to buy from. if you have any suggestions, or if you own any of these that work great for you, please let me know! thank you! (looking for a cheap, handy one that will help with as many functions as possible)

- Casio FX-83GT CW (ClassWiz)
- Casio FX-85GT CW (ClassWiz)
- Casio FX-83GT 1
- Casio FX-85GT
- Casio FX-83GTX 2
- Casio FX-85GTX
- Casio FX-83GT Plus 3
- Casio FX-85GT Plus
- Casio FX-83ES 4
- Casio FX-85ES 

I tried to solve -1/27x(x-6)(x-12)+14=15 My TL-Expire shows 3 solutions, but casio shows only one. If I press = , I get what you see on the picture. What can I do about it?

in truth i just want to play gen 3 pokemon in school just wondering if there was an emulator or if the calculator could even handle a GBA game

When finding zeros of graphs of derivatives written in this format: f2(x) = d/dx(f1(x)), i've noticed that for a lot of graphs of f1(x), the zero function on the calculator is unreliable. Sometimes, the calculator gives a random point that is not on the x axis but most times it just doesn't find a zero. This doesn't happen if rather than using the shortcut of writing f1(x) inside the derivative, i actually write the whole equation for it.

I'd really like to use this method of graphing the derivatives as it speeds the process up greatly, so pointing out things im perhaps doing wrong would be greatly appreicated (or similar shortcuts)

An example of this happening is writing f1(x) = e^(2x)-4e^(x)

I noticed that switching to a document rather than the scratchpad appears to help fix a few of these instances where this stops working, but specifically for this more complex equation above it didn't help.

what's the difference between the ti nspire cx ii with the white color compared to the cx ii cas with the black color? i noticed the price difference is around $40 so wondering if it's worth it to pay more for the cas one? pls lmk!

Hello, I'm a student looking to invest in a ti nspire calculator as my calc class requires it and I'm planning on taking more calc/physics in the future as well.

I wanted to know what the difference between the ti nspire cx ii (white color) and cx ii cas (black color) was, and if its a big enough difference for me to spend more to get the cas one?

https://preview.redd.it/oj2za5ogs44e1.png?width=1089&format=png&auto=webp&s=b601dbed89930299c7f3a76b28f1e1d3b29e5cd9

Please help, I appreciate it so much.

First tried avgRC(*equation,x,h) but it says too few arguments, then tried avgRC(y1,x,h), now it says argument must be a variable name.... idk

I searched for the symbol in the 400+ page manual but it only shows up in display examples or stats on the calculator's accuracy. It doesn't show how to actually produce it on screen. How can I make the ± on the fx-9750GIII?