Question about Texas Instruments TI-86 Calculator

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When you turn on the unit, the screen is very dark. Is there a contrast adjustment?

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Decrease the screen contrast. Turn on the calculator. Press and release the 2ND key, then press and hold the down-arrow key for a couple of seconds. If you go too far, use the 2ND and up-arrow keys.

Posted on Nov 09, 2010

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Screen dark when i turn it on


try adjusting the contrast of ur screen. There is an Fn button in blue and contrast key in blue also. Press the Fn key and the contrast key together till u get the the darkness u want.

If this does not work, u need to get a technical guy to check the connection of ur display or u might need to replace ur display.

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This sounds like low screen voltage(A1)try adjusting the a1 voltage bottom control on flyback transformer if you have a voltmeter, voltage on crt base possible market screen or A1 shoud be beteen 350/500 volts when making adjustment remember to take into account current taken by meter If voaltage will not adjust flyback transformer will have to replaced

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To adjust the contrast, turn the calculator on. Press and release the 2ND key. Press and hold the Up-arrow to increase or the Down-arrow to decrease the contrast.

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There should be a setup menu for "video" where the brightness and contrast can be adjusted.

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While using my gps 12, the screen suddenly went dark with just a narrow border of lit screen. batteries good. I can faintly see the pages behind the dark screen.


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Try adjusting the contrast. It may be too dark. Turn the calculator on press the 2nd key and the down arrow. This is how to adjust the contrast and will lighten the screen. You can darken the screen the same way, but use the up arrow instead.

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1 Answer

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try to open your tv and you can find the flyback ,in flyback you can see the screen and focus to adjust.use and try to rotate the screen,it control the brightness of your unit

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1 Answer

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Turns out the little button on the top left of the device is for adjusting the contrast. Turn on the WorkPad. Press the little button. Then hold down the down button and the contrast will be adjusted.

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