Potential Mobo problem?

I built my computer around August and it worked perfectly until now. Today I was on the internet and then it suddenly restarted but when it booted up again it did not connect with my monitor. I tried turning it off and then restarting it but my computer did not connect to the monitor. Back then the usb connections were working. Also, all the fans were on and were running normally. The monitor just didnt get a signal.

I tried to remove CMOS battery from what I read from the internet and using one RAM at a time and it still doesn't work. There are no beeps and now, the usb connections are not working either. I don't think my motherboard has a built in speaker and I doubt my earphones port is not working. I hear no beeps whatsoever. I didn't do anything else besides changing the RAM and taking the graphics card and battery out and putting it back in. Is it possible that my motherboard is faulty? I checked the cables and everything.

I know the monitor works because I'm using it right now with my laptop.I don't really have old parts to try it out with as well since I'm in uni at the moment.
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More about potential mobo problem
  1. What are your specs? Does your MB have onboard graphics? Did you double check to insure that everything was reseated firmly?
  2. Hi,

    From what I remember I have:

    Intel i5 2500k

    WD Black (WD1002FAEX) 1000GB (1TB) SATA3 7200RPM 64MB Cache (OEM)

    Corsair Enthusiast Series Modular TX550M 80PLUS Bronze Certified 550W PSU (CP-9020001-NA)
    G.SKILL Ripjaws X Series 8GB (2x4GB) DDR3 1333MHz CL9 Dual Channel Kit (F3-10666CL9D-8GBXL)

    Sapphire (11201-00-20G/11201-17-20G) AMD Radeon HD 7770 1GB GDDR5
    - 1000 MHz Clock, 4500 MHz Memory
    - PCI-Express 3.0, Dual Mini DisplayPort, Dual-Link DVI, HDMI

    ASRock Z77 Pro3 Socket 1155 Intel Z77 Chipset
    - Dual Channel DDR3 2800+(O.C.) MHz, 2x PCI-Express x16
    - GLAN, 4x SATA 3.0Gb/s, 2x SATA 6.0Gb/s, 2x USB 3.0, 4x USB 2.0
    - HDMI/D-Sub, ATX

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