Startup - Completely blank screen

Hello, how are you?

I have an HP pavillion zv5380us. yesterday I turned off my laptop and today
in the morning when I tried to start it, it powers on but doesn't do anything
else. the CD ROM makes some noise like trying to find some info even if there
is no disc inside. The screen is completely blank like if it wasn't working.
I tried with the Operative System disc and it doesn't work either.

I removed the ram and it didn't work.

Can you help me please?

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Enrique Magana Iglesias