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      06-02-2009, 12:05 PM   #9
xDrive50i
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Drives: '09 750i individual
Join Date: Jun 2008
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Quote:
Originally Posted by chuck92103 View Post
For the second time in one year my screen went blank (back light off), text barely visible.

I pressed the two eject buttons along with the volume knob together to perfomr a reset and the screen came back on. I would take it in but I think the dealer can only fix this when it is reproducable.

My guess it is a software glitch more than a hardware issue.
It could be just a software glitch, but it could also be the CCFL power supply circuit. Depending on the power supply's design, in case of a fault or overload, it either shuts down and stays off (as in your case) or it repeatedly tries to restart (which is far more stressful on components).

When you perform a reset, it would cycle the power to the CCFL power supply and hence it will try to start up again, in which case it may be able to start up normally.

This shouldn't really happen in normal operating conditions.
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2009 750i individual | Citrin Black Metallic | Platinum Merino Extended Leather | BMW Individual Composition Package (includes Sport Package) | Dynamic Handling Package | Multimedia Package | Technology Package | Executive Package
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