Laptop black screen

Jun 6, 2018
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Hello i have a laptop, and after 4 years of use the laptop never turn on the screen again.I change the graphic card but still black screen. But when i remove the graphic card and i only use the cpu the screen turns grey... what i can do.
This is my laptop "acer travelmate 5530G-703G25MN" sorry for my bad english XD