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Ok, so I recently got my old TI-82 out of my junk drawer to use again.I replaced all of the batteries and checked for corrosion, but it just wont boot. No matter what I try the thing will not turn on at all. One thing to mention is that it has been sitting for over a decade. I'm not sure if that's a factor.
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First try replacing the coin cell battery and the AAA batteries.
Second, press on then repeatedly press 2nd then the up arrow to increase the screen contrast.
If neither work then there's likely an issue with the display ribbon cable. It's very common for the ribbon cable on old TI graphing calculators to degrade over time and break.
You can test if the display still partially works by pressing:
2. 2nd
3. Math
4. Alpha
5. ln
If the calculator itself is working then this will launch a self test. I show how this works on a TI-81 which is similar to the TI-82: https://youtube.com/shorts/eX6TeJkKNtQ
Press enter 3 times, then press on.
Continue pressing enter to cycle though each test. If you see the display suddenly show something then you know the calculator itself still works but the display needs repair.
If you press it 16 times without seeing anything on the screen then either the cable is completely broken and needs repair or some other component broke and it will require hardware troubleshooting I'm not qualified to walk you through.
The ribbon cable can be repaired by soldering wires across it, bypassing the broken traces. There's more info here: https://www.cemetech.net/forum/viewtopic... (thankfully the TI-82 is a bit easier to repair than the TI-83+).
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3 commentaires
@simonziegle1472 Have the batteries leaked in this calculator in the past?
par Andrew S
I'm not sure. I did crack it open to look though. It sat for over a decade with no AAAs in it. The Memory battery was in there though.
par simon ziegler (shelz675)
@simonziegle1472 I would put some new AAAs AND a new memory battery in there and try again.
par Andrew S