Screen does not change

Parul, try to reset your TomTom. "In rare cases, your navigation device may not start correctly or may stop responding. If this happens, try resetting your device. The only information lost on your device is the clock’s time zone setting.

To reset your TomTom device, do the following:

Check that the battery is charged properly.

Charge your device for at least 2 hours before trying to turn it on again. Make sure the charging light on your device is on.

Remove the SD card

If your device uses an SD card, remove it.

Reset your device.

Use a straightened paper clip, or something similar, to push the reset button for at least 20 seconds. See the pictures below for where to find the reset button.

Turn your device on.

Press the On/off button for at least 5 seconds.

Insert the SD card

If your device uses an SD card, insert the SD card.

Where to find the reset button

The reset button is on the bottom of your TomTom. from here

Hope this helps, good luck.