My W910i screen is dark and I can't read anything???....I changed the battery but no difference

The first diagnostics you should perform are:

1. Make sure batteries are good and inserted correctly, respecting the polarity diagram: Yes, I myself made this mistake and it must be ruled out before doing anything else.
2. After a change of batteries, the screen contrast can change: It may become too dark or too light. If it is too dark, you would not think about a malfunction because you see something on the scree. BUT it the screen is too light, it is easy to conclude that there is a malfunction because you do not see what the calculator is doing after you press a key.
3. So, the second measure is to adjust the contrast. Press [2nd] key and Release it. Then Press and HOLD the UpArrow until screen is dark enough.
4. A third easy measure is to use the TIConnect software (available on education.ti.com) to retrieve the device Info, and if calculator is recognized to reinstall or update the OS. You need a TI USB SilverLink cable.

Here are some more procedures to perform in the order they are presented. Please read the post till the end.

A

1. Remove one of the AAA batteries.
2. Press and hold the [CLEAR] key.
3. While holding [CLEAR], reinsert the AAA battery and then
4. turn the calculator on.
5. the calculator should display the message "RAM Cleared".
6. Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".

B.

1. Remove batteries including the backup battery for 5minutes.
2. After the 5 minute period, reinsert all of the batteries and
3. turn the calculator on.
4. Adjust the contrast if necessary. (see above)

nyounger4242, Very common problem!! learn to do flashlight test to evaluate "switch-mode-power-supply" status. Read my FIXYA profile to find out all you need to know about Black, or Black and Blank lcd screen fixes and the options you have. Your monitor NO DIFFERENT than any other CCFL Back-lit LCD monitor in it's basic design and operation!! Good luck with repair. Use warranty if possible. Read, Read, Read, before you do anything!!!! 12fixlouie

The most frequent cause for this ''not turning on'' is a screen that is too light to see anything displayed. Try increasing the screen darkness.
Press 2nd key and release it
Press and hold the Up Arrow until it is dark enough.

If the does not work

1. Press 2nd key and relese it
   
2. Press UpArrow and release it
   
3. Repeat the two steps until screen is dark enough.
   

The problem may be due a screen that is too light to see anything on it. Adjust the screen darkness.

1. Press [2nd] key and release it.
2. Press and HOLD the [UpArrow] to draken screen.
3. Release the [UpArrow] when screen is dark enough.

You can also connect it to the computer to see if TI Connect finds it. If it does, update the OS to version 2.53MP.

You change the backup battery if the calculator tells you RAM CLEARED each time you turn it ON.

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.

please change the speaker of your phone. after that if the problem continiues, this is with network IC problem.

How old is the phone? Could be that battery is already on its end. Try different battery and see what it does.

Try a different charger, borrow from someone. It could be faulty.

Below a list of possible reason for the phone not starting at all.

• Faulty Battery.
• Faulty AC adapter.
• Defective charger socket (the one located at the bottom side of the phone)
• Internal fault (mainboard, or power switch)

Go to any phone shop and ask them to test the phone with a different charger and a different battery. They can tell what part is faulty, you can buy the replacement, and have your phone working.
Regards.

you need to changed the lcd on the phone take it to a mobile service center and have that done.