hi there try this .This same 'hiccup' also often occurs if the battery is flattened or disconnected. Instead of displaying the usual range of trip information, the tiny screen either shows just some horizontal lines at the bottom or it goes completely blank! In the worst case this will mean a replacement unit but there is also a quick fix worth trying (you will need a happy helper for this job):
ALWAYS TAKE CARE WHEN DEALING WITH BATTERIES/ELECTRICS
*Disconnect the battery.
*Hold down the MFA button.
*Reconnect the battery.
*While still holding down the MFA button, turn on the ignition, release the button and *turn off the ignition.
*Hold down the MFA button again, turn on the ignition and release the button.
You should now have a correctly working display. It has been known for the display to jump into life halfway through the process. If this happens, you can congratulate yourself and stop right there, for it has been known for the computer to 'hiccup' again if the process is continued after it comes back to life!