MacBook no ram no beep, black screen, no chime, solid sleep light

Hi,

I got a MacBook of 2007, but it doesn't boot, the screen stays black, the sleep light stays white (no blinking) and there is no chime. I can here the hard drive working.

USB port are working. I can't test it with an external monitor but I think it won't work.

I removed the RAM but I didn't get the beep that would tell me a problem with it. Reset of PRAM and SMC didn't change anything, neither testing with one empty slot.

There is a lot of similar problems but none of the solution worked.

As anyone an idea of the nature of the problem ? And a solution to fixed it ?

Thanks.

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Did you get a tome when you reset the PRAM? Do you know the difference between the sound made by the optical drive on start up and the hard drive?

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No sound emitted and yes I know the difference, in fact the optical drive has made no sound at all( I don't know if it's dead but it didn't eject the cd stucks in it with a left clic at boot).The hard drive runs normally.

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Does the SIL flash when you remove the RAM?

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