Blank screen on newly-built PC

I built a PC today and when I turn it on, it stays powered on for a few seconds and then powers off by itself. After three seconds of being powered off, it powers back on by itself. During this entire process the screen remains blank. Nothing has ever come up. I've verified that it's not a problem with my monitor. I've verified that I made the appropriate connections to the motherboard (the socket near the CPU, the really big socket, and the sockets on the graphics card itself. The lights come on, all of the fans come on, I can open and shut the DVD player, but the screen is always blank.

Intel Core i5-4670K 3.4GHz Quad-Core Processor
ASRock Z87 Extreme4 ATX LGA1150 Motherboard
Crucial Ballistix Sport 8GB (2 x 4GB) DDR3-1600 Memory
Toshiba 1TB 3.5" 7200RPM Internal Hard Drive
Sentey CS1-1420 PLUS ATX Mid Tower Case
Antec HCG-620M

1) Yes, I did read the owner's manual carefully.
2) Yes, I did plug the connectors from the PSU to the motherboard, including the one for the processor.
3) My case did not come with brass standoffs. I put the white plastic things into the holes of the motherboard that didn't have metal around them.
4) I''m not sure how to verify that the video card is fully seated. I pushed it down with a bit of forced to try to make sure it was securely in place.
5) Yes, I did use all of the required connectors.
6) I tried booting with just one stick of RAM
7) Yes, my ram is securely in place.
8) Yes, I am using the correct RAM slots. |CPU| empty | ram | empty | ram|
9) Yes, I removed the plastic guard.
10) I played close attention when installing the CPU to make sure the arrow was pointing the correct direction
11) I don't see any bent pins on the motherboard or CPU
12) It's not an aftermarket cooler
13) The CPU fan is plugged in and running
14) The thermal paste was clean. I did not remove any covering
15) There are no loose screws and I made the inside of the case neat and tidy so that wires weren't everywhere
16) Yes, I had a metal clip going from my arm to the cold water pipe under my kitchen sink
17) I did not install speakers
18) Yes, I was very careful with front panel plugs
6 answers Last reply Best Answer
More about blank screen newly built
  1. Well, Then I suggest taking the board outside the case (I know...), and testing with single RAM stick installed, DVD drive, keyboard and mouse.
    You would rule out a short.
  2. With just the motherboard, one stick of ram, and PSU (I did not connect the DVD drive) it does not work. The exact same thing happens. Does this mean there's a short in the motherboard? Is there a way for me to know which part is defective? (i.e. should I return the motherboard or should I return the processor? Or should I return anything at all? Is this fixable?)
  3. Best answer
    Hard to say. Try connecting an internal case speaker to the motherboard (buy one from a local shop - it's cheap).
    Or, if under 30 days, try returning the board and the power supply.
  4. I was going to return the motherboard and the CPU. I should be returning the power supply instead of the CPU?
  5. CPUs usually are the last thing to consider as faulty... but one never knows.
  6. Turns out, the motherboard was bad. It had bent pins that I was unable to see in my apartment but were very obvious when I brought it back to the store (I guess my apartment was just too dark). I got a new motherboard and now my computer boots up just fine...unless the graphics card is installed. But I'm 100% sure that this is an entirely separate issue.
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