Question about Texas Instruments TI-89 Calculator
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Posted on Jan 02, 2017
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Jan 24, 2012 | Texas Instruments TI-89 Calculator
Pressing the green button and, the plus sign is to raise the contrast. Keep doing that process because, if the calculator comes on and, the contrast is to low you'll never know the calculator was ever on. You should also make sure the ports are clean and nothing inside them causing the calculator to short out.
Your only suppose the have all the batteries out for 5 minute but, I had a Ti 85 that I had the batteries out for 20 minutes and, it came on. Leave them out for 5 minutes at the start of this process.
Make sure the batteries are in correctly? The batteries alternate negative/positive, positive/ negative and so on. The first time I put the batteries in, I didn't have them in correctly. I know if it happen to me that anybody could make the same mistake. The small battery should have a plus sign facing up when it is installed properly. And of course, the calculator will never come on if the batteries aren't in correctly.
Setting up the computer and, calculator for new OS installation.
Reset the RAM first. If the calculator still won't turn on goto the next paragraph and, set of instructions. On the Ti89 family, press and hold the [2nd] [Left Arrow] and [Right Arrow] keys. then press and release the [ON] key. This should reinitialize the operating system, in which you should see a progress bar or, "Installation in Progress" displayed on the screen.
Hold down the APPS key and, take one AAA battery out of the calculator. Put the one AAA battery back in while still holding down the APPS key. Release the [APPS] key and, be ready to install the new OS v3.10, ASAP!!! The (older Ti89) may need to press [ALPHA]  or, just  when the calculator display's, "Press to install..." and, then they need to install the new OS, ASAP!!! You have to do this process in the right sequence because, the calculator will be destroyed if you do not.
You can either drag and, drop the new OS into the TI Connect icon (pictured below), on the desktop.
Or click, Start and open Programs, then open TI Tools, then open TI Connect, then open TI OSDownloader. Then just follow the instructions the software gives you. The best way is to drag and, drop the OS into the TI Connect icon because, you know your installing the latest OS. TI OSDownloader might not give you the latest OS version.
If this procedure doesn't work and, is still under "Warranty", I'd see if I could get a replacement from Texas Instruments. Even if out of "Warranty", I'd would still seek replacement with Texas Instruments.
If you have any question just post a comment and, I'll respond quickly.
Jan 21, 2011 | Texas Instruments TI-89 Calculator
Jan 15, 2011 | Texas Instruments TI-89 Calculator
Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute
period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.
Just keep trying. Sometimes they can be a pain.
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