Bright spot, LCD pixels OK

Hi all,
My MacBook pro showed suddenly a very bright spot on the screen (just above the text 'van den'):
http://www.flickr.com/photos/57660179@N04/5307076958/
No LCD pixels are broken. Too me this looks like a LED driver problem: One LED is powered at 100%. I think this should never happen, even on the most brightest screen mode. At the back of the screen, the Apple logo is a little 'bubbled' right on this bright spot. This could prove the problem of an overheated LED, right?
According to the Service Center this is 'user damage'. Today it has been send back to let them prove it is actually user damage.
Message was edited by: Mark73

Thanks for helping troubleshooting! The 'speedometer' scenario is interesting but not likely the cause (famous last words). The next thing happened: I turned off the computer (the screen was still OK), closed it and put it in the cupboard. 15 minutes later my girlfriend took the laptop, opened it, started it up and the strange spot was there. Closing or opening could have caused the magnet to come loose.
With the 'bubbly' Apple logo I meant there's a little 'hill' in it exactly at the location of the strange bright spot (upper left of the white Apple logo). I do not know how thick that white plastic logo is, but I guess something has to press very hard to deform it. Maybe it is just a coincident and is it due to some inaccuracy in the plastic.
When the service center is not willing to fix it, I will try the paperclip and sleep test, good ideas! Maybe that will convince them.
btw, is this irreversible damage? Maybe the screen is OK when the pressure is gone? If so, I will try to fix it when the service center still refuses to repair it under warranty. It saves me a 500euro bill ...
Anyway, I will keep you informed about this story.
Thanks & best wishes for 2011.

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