17 R1, 8 Beep Error On Startup

Hey everyone,

I own an Alienware 17 R1 that's getting an 8 beep error on boot up constantly. I've gotten this error intermittently in the past, either after the screen cuts out with flickering lines or by going white, or after moving the computer around. But after waiting 30-60 min, the computer would boot up normally. The last time I was in a situation like this where the computer would get constant 8 beep errors when trying to boot, I reseated mostly everything and it started up. However, this time that's not working. I've reseated the hard drives, RAM, the LCD cables that connect to the motherboard, and the GPU. 

I understand this is a problem either with the GPU or LCD, but I don't see any obvious damage to the GPU. Additionally, I am able to boot the computer connected to an external display, but I can only see either the Dell logo or access the BIOS screen before the computer loses connection to the external display while the internal display stays black. Additionally, I've tried booting the computer without the GPU connected, but I would just get a blank internal or external display with no beeping.

I would like some help fixing this, or at least know whenever it's a GPU or LCD problem so I can replace the part.

Thanks