Question about Texas Instruments TI-84 Plus Silver Edition Graphic Calculator
When I turn the calculator on, the cursor blinks and none of the keys work. I have replaced the batteries.
Is the cursor the graphing cursor or the normal typing cursor?
Posted on Feb 22, 2008
Had this problem aswell, flashing cursor and unresponsive keypad - tried everything, the calculator was still accessible through the computer link - which we thought was strange. We ended up buying another for our son who was in the middle of exams.
Out of curiosity, and knowing the broken one was going in the bin we decided to take the back off it. We've scientific calculators in the family that are 30 years old and still work and found it strange that this one should fail after 18 months. When opened we were surprised it had some form of metal powder and metal shards all over the circuitry and around the inside of the case. It looks like it was from the metal sheet protection blanket covering the circuit board. It looked like small flakes of aluminium and fine powder that came from the screw points and up near the usb/ power adaptor end, where there we signs of the circuit board rubbing on the metal blanket which inturn was rubbing on the plastic case. Not sure why.
Anyway cleaned it all out, and removed the keypad rubber as the metal powder was under here aswell (just watch the keys as they all fall off - take a photo of it first or find the layout on the web); reassembled and were surprised that it came back to life! I'd only do this as a last resort if it was out of warranty.
Posted on Jun 04, 2013
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