Rep in the waiting if it's this tony!!Hi, I had exactly the same problem on my ZT-T last week. I took out the IPK, disconnected, reconnected and then re-fitted. All well!
Prior to this, you might want to try simply disconnecting battery for a few minutes - but make sure that sat nav (if you have one) is shut down properly.
IPK = Instrument PacK.ermmmm "IPK" dont laff guys what is an IPK .............