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TI-NSpire es una calculadora gráfica programable lanzada en 2007 por Texas Instruments.

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How do I get into maintenance mode with the TI-84 keypad?

I got this untested for $18 with an offer, so I do not have a lot invested into this just based on what I paid. However, it only comes with the TI-84 keypad, which is making me think the seller probably used it for school and had to use the TI-84 emulation since they usually come with a Nspire keypad OR at least the Nspire+TI-84 keypads. However, I am not getting either Nspire keypad with this - just the TI-84 one.

With a lot of these it seems to be an OS issue (which is why I bought it). Reloading the OS is not an issue since I have the correct cable (MicroUSB), but I do not know IF you can access the maintenance mode for the Nspire OS with this keypad - I do not see any instructions on how to do so, and Reddit says no.

Is it possible to access maintenance mode with the keypad I got should I need to reload the OS, or do I need to purchase an Nspire specific one if there’s an OS problem and it’s recoverable?

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As far as the other keypad, this is the one my Nspire shipped with - likely alongside the TI-84 one:

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@thelastmill

I was hoping you'd gravitate towards this since you're the TI expert.

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@nick I'm working on it. I should have an answer by the end of the day!

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@thelastmill Alright. Hopefully I can get in without the Nspire keypad if it's bad software, which seems to happen a lot with the "untested as-is" TI graphing calculators. At least they're cheap if it's not possible and has bad software if I need to get in.

Hopefully the seller ships the Nspire keypad if there's no other way to get in, but that's usually not the case with eBay.

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It looks like it is possible! You’ll want to press Graph+Enter+8. Here’s the instruction for each possible keypad:

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Source: hackspire.org

One important thing about the cable, the Nspire requires a Mini-USB connector which is slightly bigger than the more common Micro-USB you mentioned. :)

Note: I had help from Adriweb on this one since I’m more experienced with the TI 84 lineup rather than Nspire calculators.

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Yeah that's what I meant :P. The Nspire was enough of a deal I didn't need but I could also afford it as a backup in case I need it. At $18, it was hard to say no, especially if I can repair it - even with the screen damage. It seems like a lot of them are an easy fix too if you know what to run away from - notably busted screens on the B&W series and any Nspire Cx for the time being.

I'm just used to Micro and -C now so it was a second nature error. I knew it was mini.

Eventually I'll need to get an Nspire keypad to use it beyond a emulated TI-84, but knowing it can be done gives me a lead on repairing it before I buy one.

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The calculator is going to be here today. Hopefully I get the Nspire keypad but it isn't in the photo but I don't think so - yeah, it didn't. It turns out TI ships it with that keypad I didn't get, but the 84 one was free by mail. And the mark isn't as bad as it looked in the photo - it's minor.

Just needed a cleanup of the battery terminals to get it working :-). These usually go for $35+ with both keypads. Can confirm the key combo works. I was able to get cables and the keypad for $8.99 vs $5 for just the keypad for this too, so it's mostly complete short the student software I see copies of. Still not too bad compared to what they go for working.

I'm not worried about the firmware being at 4.2.0(?) not being in school - this was too cheap to pass on, especially since I know someone who may need my TI-84 for testing since it's better accepted then the Nspire, especially since it's already a 2.55MP factory that's hard to downgrade.

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Awesome, I'm glad it worked out so well for you @nick ! One question, if you have the TI 84 keypad in, does pressing [mode] > [alpha] > [S] bring up stats for the calculator's OS and BOOT code? If so, what are they?

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@thelastmill The TI-84 diagnostic does not work on the Nspire. Goes back into entry mode. As to why I was confident I could get it going, this was the issue. They didn't clean it, so I knew I had a good shot at getting it going. I see some without the slide cover for less, but no proof repairs weren't attempted - which is a sign it was tried and probably a lost cause.

I don't get anything there but I do see 2nd->Mem->1 says 2.44 TI-84 Plus Silver edition but no boot code.

Maybe the 84 emulation is pre 2.55MP.

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