Why won't my system boot properly?

I hear the boot sound but there's no image on the screen. I tried an smc reset and a pram reset. i tried to connect to an external monitor but the monitor never got a signal.

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This is a known issue. I took it to the genius bar and they fixed it even though it was out of warranty. The problem was with the logic board (video card).

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Try booting from the CD. Insert a install disk and boot holding the "C" key down.

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Out of curiosity, if he can't get to open firmware, would booting from a CD do anything?

Yes, it might tell us if it has a dead hard drive. I've seen this machine not be able to boot from anything unless it has a good hard drive. Once not even from a CD without a good drive. I put a known good drive with a system in it and it booted right up.

You used to be able to boot the disk without directly using the Open Firmware interface, but that went out with the demise of the Motorola Power PC

Unfortunately my optical drive isn't functional, so i can't try that. I just took the computer to my local genius bar. They told me that it was the logic board that was broken and they're replacing it free of charge. It looks like it was a known issue with these particular logic boards.

That's fantastic. If you can, without hurting yourself, would you find out where they acknowledge it being a know issue so that others can be helped.

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Here's Apple's admission of the NVIDIA 8600M GT graphics processor issue, and promise to repair free of charge if failed within 3 years of purchase, even if out of warranty:

http://support.apple.com/kb/TS2377

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Mi macbook pro takes almost 6 minutes to starts... it is faster if I start with windows (30 secs. boot camp)

A blue screen appears after the starting sound and it stays like that

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Please start a new question so that it will receive the attention it deserves. Thanks

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