Why won't my TI-Nspire won't power on?

Question

Texas Instruments TI-Nspire

TI-NSpire is a programmable, graphing calculator released in 2007 by Texas Instruments.

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Drake @launce

İtibar: 25

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Gönderildi: 25 Eyl 2018

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Why won't my TI-Nspire won't power on?

Hi,

I purchased this calculator in ‘08, and used it 2009-2013 with no issues. I tried to turn it on recently after leaving in storage for over 5 years. There were batteries left in it throughout this time. It didn’t power on, even after replacing the old batteries with brand new ones.

There was battery acid build up, after removing said acid it still did not work. I opened it up and scrapped some more from some of the panels, still no luck. I have attached some photos. Anyone have any ideas on how I might be able to fix this?

Thanks

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Bu iyi bir soru mu?

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2 Yorum

Although, unfortunately, I don't know what to do to help you, I would like to thank you for posting your question with excellent wording and for including pictures! That will make it much easier for someone who can really help you. The only thing I can say that's remotely helpful is to check the motherboard for any acid damage. This could be a point that looks melted, or a bad connection. Maybe taking a multi-meter and testing if certain points still receive power could help identify what's wrong? Sorry I can't add anything definitive. :\

TheLastMillennial tarafından 27 Eyl 2018

Try putting in new batteries, and then connect it to another hand-held, like you were going to transfer a program or the OS. Then turn on the working one, and then the non-working one. It fixed the problem for me.

George Garner tarafından 8 Ağu 2020

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Drake @launce

İtibar: 25

3

Gönderildi: 30 Eyl 2018

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I managed to get it working! What I ended up doing was taking more cloth and gently/carefully wiping the whole motherboard. As seen in the pictures it didn’t look terribly dirty so I was quite surprised when it worked. I took extra time to make sure the large main gold connections stemming from the battery locations were cleaned.

However, upon turning it on the screen has two horizontal lines of dead pixels, calculator is still serviceable but they are vexing. Not sure if I can order a new screen online somewhere. One last thing is that my reset button is broken, so I cant reset it.

@thelastmill your comment what was made me reopen it up and take another look, it meant more then you can know. Keep up the awesome work!

Thanks

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1 Yorum:

Great, I'm glad to hear you got it working! As for your screen, I know the TI 83/84 Plus Series are notorious for degrading ribbon cables. Your Nspire may have a similar issue, you may want to try taking a multi meter and testing which parts of the cable may have failed. You can repair the broken using some thin wire, there's a topic about this here: https://www.cemetech.net/forum/viewtopic...

TheLastMillennial tarafından 30 Eyl 2018

Yorum Ekle

Although, unfortunately, I don't know what to do to help you, I would like to thank you for posting your question with excellent wording and for including pictures! That will make it much easier for someone who can really help you. The only thing I can say that's remotely helpful is to check the motherboard for any acid damage. This could be a point that looks melted, or a bad connection. Maybe taking a multi-meter and testing if certain points still receive power could help identify what's wrong? Sorry I can't add anything definitive. :\ — TheLastMillennial
Try putting in new batteries, and then connect it to another hand-held, like you were going to transfer a program or the OS. Then turn on the working one, and then the non-working one. It fixed the problem for me. — George Garner
Great, I'm glad to hear you got it working! As for your screen, I know the TI 83/84 Plus Series are notorious for degrading ribbon cables. Your Nspire may have a similar issue, you may want to try taking a multi meter and testing which parts of the cable may have failed. You can repair the broken using some thin wire, there's a topic about this here: https://www.cemetech.net/forum/viewtopic... — TheLastMillennial

Old Evil Wizard @oldevilwizard İtibar: 13 1 · Answer 1 · 2024-08-27T17:39:21-07:00

Just got my 2010 model working.

The batteries were no longer making proper contact with the motherboard.

There had been minor battery corrosion on the spring contacts in the battery compartment from the AAA batteries that were left inside. After cleaning that away with a wire brush and some alcohol the device still wouldnt power on.

I opened the device by removing:

# The keyboard, by pressing the back switch and sliding off

2 philips screws (+) to remove the optional rechargable battery compartment from the upper back
6 torque screws(*), two of which are inside the rechargable battery compartment and prying off the back, which takes some effort but its quite sturdy
6 small philips screws (+) on the motherboard and lifting. If it doesnt lift easily, pressing and lifting the display from its front face helps. Be mindful of the delicate ribbon which connects the motherboard to the display board.

I examined the motherboard and found a vibrant blue precipitate from presumably the gold traces around the motherboard and the battery corrosion. This cleaned away quite readily with a clean cotton swab dipped in isopropyl alcohol and a can of compressed air.

On the underside of the motherboard were four gold rectangular contact pads where the AAA battery's four small steel arm-like contacts would deliver power. These pads had been burned away at the point of contact.

I placed flux on the pads, and using a soldering iron and some solder, left a bead at each of the burned contact pads. I ensured that the pads were not too tall so as to remount the motherboard. This essentially bridged the holes on the pads. Putting it all back together and pressing the power button yielded a success!

Please practice safety when using solder and soldering irons, including proper ventillation!