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Author Topic: TI 84+ won't receive OS  (Read 7333 times)

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Offline p2

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TI 84+ won't receive OS
« on: March 19, 2015, 10:52:26 am »
General information:
TI 84+ Silver Edition (the so-called "Teachers Edition" with the extra plug at the upper side)
Hardware version: 3
Boot version: 1.02
OS version: 2.4.0

Problem:
Sending OS 2.4.3 using TI Connect failed: missing certificate
Sending OS 2.4.3 using TiLP failed: NACK received. Cause: the command has been refused
*both stoped before it started to receive the OS.

Current situation:
Tried to directly send OS 2.4.3 from another device.
But failed after receiving the OS - Validation Error
Now it's like Waiting... Please install operating system now


Anyone got another idea what I could do to fix it?
« Last Edit: March 19, 2015, 10:55:51 am by p2 »
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Offline Sorunome

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Re: TI 84+ won't receive OS
« Reply #1 on: March 19, 2015, 01:22:45 pm »
maybe OS 2.53MP or 2.55MP will work, and then you can install unsigned to remove validation cert. stuff
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Offline p2

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Re: TI 84+ won't receive OS
« Reply #2 on: March 19, 2015, 01:31:13 pm »
So installing 2.5.5 on another device and then send it to that one?
*Since it's still at Waiting... Please install operating system now it can't connect to my computer
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Offline Sorunome

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Re: TI 84+ won't receive OS
« Reply #3 on: March 19, 2015, 01:32:07 pm »
you can connect it just neither tilp nor ticalc "see" the calc so you send it "blindly"
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Offline p2

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Re: TI 84+ won't receive OS
« Reply #4 on: March 19, 2015, 01:45:52 pm »
Both programs somehow still remembered the last session with the TI 84+ Silver Edition and were acting as if it was still connected - but had no access to it. Same results for 2.5.5 and 2.4.3. Results below.

Quote from: TiLP
The cable cannot be used.
cause: the cable has not been
initialized due to a prevours/current
error.

Quote from: TI Connect
Unable to send ...\TI83Plus_OS.8Xu.  Please try again.


Is there any trick or something behind sending a file "blindly" as you mentioned?
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Offline Sorunome

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Re: TI 84+ won't receive OS
« Reply #5 on: March 19, 2015, 01:46:46 pm »
then just do it with another calc xD
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Offline p2

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Re: TI 84+ won't receive OS
« Reply #6 on: March 19, 2015, 02:06:54 pm »
And how can I make sure it won't just be a Validation error again...?
*I would prefer to know before ruining another device with that crappy new OS  :-\


Edit: Using different linking cables also didn't change anything. (retried sending "blindly")
« Last Edit: March 19, 2015, 04:43:18 pm by p2 »
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Offline TIfanx1999

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Re: TI 84+ won't receive OS
« Reply #7 on: March 19, 2015, 11:33:23 pm »
Hey p2, long time no see. Hope you're doing well. As to your question, I'm not really sure. There's probably a topic floating around about it here somewhere, but I can't recall at the moment. If your certificate is messed up I seem to recall that it can cause some issues. Brandon W or the thepenguin77 might have some insight.
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Offline p2

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Re: TI 84+ won't receive OS
« Reply #8 on: March 20, 2015, 05:36:50 am »
So I have to focus on fixing that stupid certificate now?
Maybe there's some way to somehow reset the certificate or send a working certificate from another device...?

@Art_of_camelot: I'm fine, thx :) Hungry for cookies and tired as always ^^
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