My trackball works on my blackberry and i recieve calls but it seems like my keyboard is locked i cant pick up calls or select options

Your trackball and the keyboard seems not working. You may need a replacement for both parts.

hi Titchypink.
this is all i could find out,hope it helps you out.
Trackpad, trackball, or keyboard not working on a BlackBerry smartphone running BlackBerry OS 7.1 and earlier Article Number: 000029640 First Published: April 26, 2017 Last Modified: April 26, 2017 Type: Support

Environment

• BlackBerry smartphones running BlackBerry OS version 6 to 7.1
• BlackBerry smartphones running BlackBerry Device Software 5.0

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Overview

In some situations, a BlackBerry smartphone with a trackpad or trackball may experience issues with sensitivity, latency, or scrolling. Additionally, the BlackBerry smartphone keyboard, or other buttons may be unresponsive.
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Cause

This issue might be caused by one of the following:

1. The trackball/trackpad sensitivity needs to be adjusted.
2. Make sure the trackball/trackpad is not affected by a software freeze or an application freezing.
3. The BlackBerry Device Software is out of date and requires an update to resolve the trackpad, trackball or keyboard issue.
4. The physical trackpad, trackball or keyboard hardware is malfunctioning.

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Resolution

Resolution for Cause 1
Complete the steps in Article 5447 to ensure the trackball/trackpad sensitivity is correctly.
Resolution for Cause 2
For BlackBerry smartphones running BlackBerry OS version 6 to 7.1 using a trackpad, complete the following:

1. From the Home screen, select Options.
2. Select Typing and Language.
3. Select Trackpad Sensitivity.
4. Ensure Audible Roll is selected.
5. Rapidly roll the trackpad up, down, right, and left.
6. If an audible click is heard while not responding, proceed to Resolution for Cause 4 as this could be a software related problem.

For BlackBerry smartphones running BlackBerry Device Software 5.0 using a trackball, complete the following:

1. From the Home screen, select Options.
2. Select Screen/Keyboard.
3. Ensure Trackball Audible Roll is selected.
4. Rapidly roll the trackball up, down, right, and left.
5. If an audible click is heard while not responding, proceed to Resolution 4 as this could be a software related problem.
6. If an audible click is not heard, the problem may be related to a hardware issue. Please contact the wireless service provider for additional steps.

If an audible click is not heard, the problem may be related to a hardware issue. Please contact the wireless service provider for additional steps.
Resolution for Cause 3
To update BlackBerry Device Software using BlackBerry Desktop Software see, Article 11320.
or
To update the BlackBerry Device Software on the BlackBerry smartphone visit http://www.blackberry.com/update/
Resolution for Cause 4
Use the BlackBerry Virtual Expert diagnostics application. For more information, see Article 35973.if not try this link. blackberry scroll pad is not working Google Search

Hi, to change the trackball or trackpad sensitivity of the BlackBerry smartphone, complete the following steps:
1) On the Home screen, go to Options > Screen/Keyboard.
2) In the Trackball or Trackpad section, click Horizontal Sensitivity or Vertical Sensitivity to change the sensitivity level.
3) Press the Menu key and select Save. The new sensitivity levels are saved.
A higher sensitivity number indicates a higher sensitivity level for the trackball or trackpad.
The trackball user interface found on certain BlackBerry smartphones is similar to the trackball used in a mouse in conjunction with a desktop computer.
In the event debris comes in contact with the trackball and affects the usability of the BlackBerry smartphone, rapidly roll the trackball up, down, left, or right to potentially correct the problem.
If rapidly rolling the trackball does not correct the problem, please contact your wireless service provider for support options.
Try to re-install the BlackBerry Device Software using the application loader tool, before you re-install the software please back up the BlackBerry smartphone data.I hope this information will be helpful to you

Cause:

The sensitivity of the trackball/trackwheel might be less

Faulty Hardware

Resolution:

Increase the sensitivity by following procedure Option -> Screen and Keyboard -> Horizontal Sensitivity and Vertical Sensitivity to 100

change the settings
in menu select applications --> select options --> select keyboard/screen --> change resolution sensitivity (vertical and horizontal) to 100% --> select menu --> select save

Did it get wet at all? If so, there is an area under the track ball that is very sensitive to humidity. Cleaning that area with a brush to remove any of residue that may have remained after letting the phone dry can sometime get it up and running again. If you're out of warranty try to remove the trackball and clean the area below it if necessary. There is a Blackberry Repair Guide that shows how to open a Blackberry and remove the track ball yourself.

try going to options -screen/keyboard and adjusting the trackball settings

you need to take the phone to a mobile service center and have the trackball service the pins could have alot of dust and dirt on them.

the phone number should be retrieved from the sim card or carrier login procedure.

I had a few blackberry's, including a 75xx series one, and when I popped in another card (I have a couple of prepaid subscriptions for testing), the number always came up automatically.

Should work... If not, try contacting RIM/Blackberry support, but I doubt they'll still give support for the 7xxx series models... sorry

Try removing the batteries, wait for a while ,reinsert batteries and reconnect to reciever. Let me know how it goes..