Having problems with your Dell Latitude C640 Notebook ?

"Diagnostic Boot Selected" problem on power-up boot

\015 I've got a Dell C640 laptop that has recently developed the consistent "Diagnostic Boot Selected" problem on power-up boot. Normally you only get this by pressing the Fn or "i" button during power up, or by using F12 and purposely selecting Diagnostic Boot. I get it all the time without pressing anything extra.\015

Answers :

I have a same prolem but nor solved
I have found this to be a problem with the keyboard. I suspect that it is due to a distortion of the board rather than something related to individual keys. This would help to explain why it is often a problem for users who have recently modified their system, perhaps installed new RAM. But sometimes it happens just out of the blue as it were.
Sometimes the normal start can be effected by pressing the function key at the same time as the start key. But this method is not reliably repeatable.
Often the computer to start normally if the Control Center Cover is removed. But while this suggests a problem with the cover strip, I have found that changing the keyboard and then reinstalling the Control Center Cover will fix the problem.
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