Cant Boot my Screen goes with diagonal multi color cube

when i try to boot my MacBookpro all i got at the screen is diagonal multicolor cube all across the screen then i got the blue screen and the screen split in 4 and i got the black screen then i have to reboot???

logic board?? ... graphic card?

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Boot to an external display, if it's normal there, then you need to replace your LCD.

It sounds more to me like a G-card or logic board issue though.

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