help with new mother board!!!!!!!

So I just bought a new mother board for my dell studio 1458 laptop and it was a direct replacement except the graphics card is different. I put everything back together, and went to boot. The screen stayed a dark black green flashed a couple times and it beeped at me a few time. When it did come up, the screen was really dark, and it came up as trying to fix windows from not booting. Also during this time, the CPU fan was screaming. What's going on here? Did I miss a step?

Sounds like something might not be seated all the way...worth double checking.

Edit.

Ok now the dell logo is comming up and it says boot windows normally or startup repair but CPU fan is still screaming and screen is still really dark. To where its extreamly hard to see and hard to tell if its on. Ima make sure I connected screen right and then try and hit boot windows normally.

Alright so windows started normally but screen is still dark and CPU fan is still screaming! I'll try a BIOS update later.

EBay. I'm pretty sure it was used. But had no visual artifacts. CPU is at Max frequency. Do think a BIOS update will fix the screen?

Yupp.... positive its 205RN

Here's the link:

Dell Studio 1458 Motherboard 205RN 0205RN CN 0205RN | eBay