Display wont turn on after replacing motherboard (Please Help!)

Gizmo j

Golden Member
Nov 9, 2013
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I have a Asus X551CA and a while ago it would not start at all so I replaced the motherboard and now the laptop starts up.

I made sure the new motherboard has the exact same model number and CPU.

But the problem is the display will not turn on!

I tried connection the laptop to a desktop monitor through VGA and HDMI but it still will not show on the desktop!

Do I have to re-install windows or something??