Dark screen I have a unit that the screen is very dark. I have tried using Func Y and the screen doesn't lighten up. What I get when I press Func Y is ]. Any suggestions??

To adjust the screen contrast (to lighten screen or to darken it)

1. Press the [2nd] key and RELEASE it.
2. Press and HOLD the UP Arrow to darken screen, or
3. Press and HOLD the DOWN Arrow to lighten it.

Keep pressing the UP or Down arrows (whichever you need to press) until the screen contrast is adequate.

In your case, the screen is too dark, so you must press the DOWN arrow to lighten it.

Press and hold the Control key marked with a green diamond, then press the minus key (above the + ) to lighten the screen. If you lighten the screen contrast too much you can darken it as follows:
To darken the screen press and hold the diamond key and press the + key.

Turn the calculator on. Press and release the 2ND key. Press and hold the down-arrow key until the screen lightens.

If you go too far, repeat the process using the up-arrow instead of the down-arrow.

The most probable cause (at least I hope so) is that the screen got too dark after you changed the batteries. It is a common occurrence: Screen becomes too dark or too light.
To adjust the screen contrast:

1. Press ^2nd key and release it.
2. Press and HOLD the DownArrow key until screen lightens to your taste.

Try

1. Press 2nd key and release it
2. Press and HOLD Down arrow to lighten.
   

Use brighten controls on monitor to lighten

Hi,
After changing the batteries the calculator is restored to factory defaults, but the screen contrast may change. The screen may be too light to see anything or., as in your case too dark.

To lighten screen
Press [2nd] key and release it.
Press and hold [DownArrow] until screen is light enough.

To darken screen
Press [2nd] key and release it.
Press and hold [UpArrow] until screen is dark enough.

Hope it helps.
Thank You for using FixYa and for rating the solution.

Hi,
Check that the terminals in the battery compartment are clean and shiny. Remove any powder left after battery leakage. Insert fresh batteries in calculator. Make sure you respect the polarity diagram. +-+- (Many malfunctions come from incorrectly placed batteries).

After replacing batteries, calculator is restored to defaults and screen display may be too loght or too dark

To adjust the screen: Darken or lighten display

To darken screen
Press [2nd] key and release it.
Press and hold [UpArrow] until screen is dark enough.

To lighten screen
Press [2nd] key and release it.
Press and hold [DownArrow] until screen is light enough.

Hope it helps.

Try holding CTRL down and pressing F6 to lighten and F5 to darken screen...

Press the 2nd key and the down arrow to lighten the screen.