I am trying to repair a Dell Inspiron 5150 Laptop. Here's a description of the problem:-
From pressing the power on button the screen lights up dimly although it does not display any boot up info, in fact it displays nothing at all. There is hard drive activity during this process.
Hard drive activity ceases after a minute or so and still the screen displays nothing at all. However, when I attach an external monitor it works perfectly and as soon as I attach the monitor I can see that the laptop has actually booted to Windows and is waiting for me to login. I also need to see the boot up info but this is not displayed on the external monitor as the monitor does not kick in until Windows has started.
I have tried hitting the Fn+F8 key to toggle between LCD/CRT....no result! At first I thought the screen may be dead but I am convinced it is something else, I just don't know what.
Hope someone can help!