Thanks for the thought but I think that this is unlikely - if I select TV on the main menu I get full brightness static (of course, it being analog) and the graphics overlay is full brightness. If I then select the sat nav option on the main menu, the screen goes dim again. Although the radio display is also dimmed when the sat nav cd computer is connected.
And as I said if I disconnect the sat nav cd computer the screen is normal
brightness on all functions (except sat nav of course), albeit with the "blocky" simplified screen graphics.
I'll have a look at the video connection but it's difficult to see how the tv unit could make this happen. Unless you had specific knowledge/experience that says that this could happen?
But thanks for responding anyway, much appreciated.
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