Screen black after upgrading computer and LED not correct color

hopeandhaley

Honorable
Sep 8, 2016
5
0
10,510
Back story:
4 years ago, I built a custom PC with family friend who picked all the parts and helped me the entire time. Today, I attempted to upgrade it alone using a lot of the same parts, but after putting it all together, the screen is black.

I am a newbie at building computers and tried my best to look at forums and YouTube videos. I even took photos of the computer before changing parts, but it wasn't helpful because I took pictures of cords, but not the labels of where they had been, and didn't pay attention to which cord plugs weren't being used.

Problems
1) When I try to turn on computer, the screen is blank. 2) My PC case is supposed to have red lights that glow on the sides when it's on, but it either remains dark or flashes orange sporadically. (I think this has something to do with the extra SATA cord that I didn't know where to plug in.)

What I've done so far in no particular order:
I am seriously thinking I plugged something in wrong. I watched videos to try to see if I plugged stuff in the right spots. I have that extra SATA cord that I could not figure out where to plug it in. I flipped through entire manual and tried to follow the pictures, learned stuff but didn't solve anything.

I got a few different q-codes. First, it was 53, then AA (thought it was an error code so kept messing with it), then d6, then AA (found out this means everything is alright, but why was the screen still black?!), and now d6 again (I hadn't done anything to it after achieving AA again, went for a walk and turned it on and the code was back to being screwed up).

Motherboard has 8 RAM slots, but I only bought 2 DDR4 sticks, so took out 1 for "testing" purposes based on forum advice. Took out the CPU fan, added more thermal paste, put in the fan by trying to screw it in more evenly on both sides (these 2 steps made it get the AA qcode). After d6 qcode I reset the CMOS and also pulled out the CMOS battery for over 5 min. I looked at the manual but did not see which Graphics card slot was preferred, so I put it in the very top closest to the CPU fan. Other forums suggested the mobo could be messed up (but it's new!) or the power supply is failing (but it was working til I changed out the parts!). Not sure what to do now.

Parts
New > CPU: Intel Xeon E5-1620 v3 Quad-Core Processor
New > CPU Cooler: Cooler Master Hyper D92
Video Card: EVGA GeForce GTX 950
New > Memory: CORSAIR Vengeance LPX 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000
Case: Rosewill THOR v2-W ATX Full Tower Case
 

hopeandhaley

Honorable
Sep 8, 2016
5
0
10,510
Update: I realized the extra SATA cord was because the computer had 2 CD drives, and I had removed the 2nd. Apparently qcode d6 is "no console output devices are found", so that must mean something is up with the graphics card? I think the graphics card is either incompatible, somehow broken, or not plugged in correctly or not plugged into the correct spot on the motherboard. But I don't have any other graphics card to borrow, so I'm not sure what to do.