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Thanks for the reply, Sockeye. I still have the official 2007 version of maps. I have reinstalled this version but it's still not reading the disc. I previously had a burned *iso image of the official 2010 maps installed, which was working fine until it decided to just stop working for whatever reason. I rang Melb City Lexus, they advised performing all the tests that they would do, which I have already done, but still no good. They then said that the ECU inside the unit would probably need to be repaired at the cost of between $600 - $1200 dollars. I think the best bet now is to buy a seven inch TomTom Sat Nav for a couple of hundred and stick it to the screen.

Hi All, Can someone provide an answer to the errors showing on the navigation screen. I have an official version of Sensis Maps installed and was working fine, then all of a sudden the above error messages started to occur. Will I have to replace the boot mounted unit or is there a quick fix for this problem?