Question about Texas Instruments TI-85 Calculator

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Ti-85: Horizontal Line Across Screen - Battery Problem?

My screen just powers up to a horizontal line. Does the smaller backup battery need replacing? Is something else wrong? Thank you.

Posted by Scott H-Name on


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I 'm confused about whether i have to place two kinds of batteries into ti 85 calculator both Cr1616 battery and AAA size batteries? BEcause when i place one of two kinds of batteries the screen did not turn on

Posted on Sep 18, 2008



I had that same prob, but i sent it in 4 repairs.
I took out the replacement battery, but it started up normal.

Posted on Jan 24, 2008



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Yes, the back up battery must be replaced.

Posted on Aug 27, 2007

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The UPS in this office is out of order, message that appear on screen is 'UPS V OUT LIMITS' and 'Battery critical'

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Plug the battery backup into a working electrical outlet. If the battery backup turns on when the power button is pressed, then the problem may be that the previous electrical outlet is faulty. Proceed to step three. If the battery backup doesn't turn on, proceed to step two.
  • 2 Reset the circuit breaker on the battery backup. APC battery backups have a labeled circuit breaker button located on the unit near the phone line, fax line, USB, network and coaxial cable inputs. Press the button to reset the circuit breaker. Power on the battery backup by pressing the power button. If the battery backup powers on, proceed to step three. If the battery backup doesn't turn on, proceed to step six.

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  • 5 Test battery charge. Once the battery is fully charged, repeat step three. If the monitor stays on when power is interrupted to the battery backup, the issue is solved and the problem resulted from an incompletely charged battery. If the monitor turns off when power is interrupted, the battery within the battery backup is faulty and needs to be replaced.
  • 6 Replace the battery backup unit. The unit itself is faulty. If the battery backup is under warranty, contact APC to request a replacement.
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