Question about Texas Instruments TI-89 Calculator

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Won't turn on batteries good - Texas Instruments TI-89 Calculator

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  • kakima Oct 04, 2010

    TI calculators have an annoying habit of dimming the screen when the batteries are changed so that it appears as if the calculator isn't turning on. Turn the calculator on (or at least press the ON key). Press and hold the diamond key. Press and hold the + key for a few seconds and see whether the screen becomes legible. If you go too far, use the diamond and - keys to lighten the screen.

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Receiving no response in over five months, I assume the suggested contrast adjustment solved the problem.

Posted on Mar 28, 2011

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Daniel, If battery is known to be good, could be bad connections at battery, starter/solenoid, or ground on engine/frame, battery cables also could be bad with build up of corrosion internally. Check the attached links,instruction and guides, Good luck
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