Problems when cold won't start

Hi I am on my 4th logic Board.

2011 in MBP

just recently after 8 months of having a ne logic board put in. Its having the above . slow start up. And if very cold. the system boots Apple has lines, Bit grey. And then forever grey screen.

Forced shut down, re start, Its OK.

I have re set all permissions, mac clean.

Still slow starting up from warm.

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Can you please give us the exact model of your system or give us the full serial number so we can look it up that way.