Blackberry Pearl 8220 User Guide - Page 174

User Guide Display troubleshooting Display troubleshooting My device screen turns off When you do not use your BlackBerry® device for a period of time, the screen turns off to conserve battery power. To turn on the screen, click the trackball or press a key. My display changed Depending on your theme, display options, such as your font and Home screen background, might change when you switch themes. Related topics Change the display font, 167 Use a picture as the Home screen background, 96 No application opens when I press a Convenience key Try performing the following actions: • Open the flip. • Verify that you have not deleted the application that you assigned to the key. • Assign a different application to the key. The notification details do not appear on the external display If your BlackBerry® device is locked or content protection is turned on, you receive notifications of new messages, phone calls, and calendar reminders, but the notification details, such as the sender and subject line in a message, do not appear on the external display. 172