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No Display, mouse and keyboard are not on. b7...

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Guys i really need help. I built a new gaming computer about 5 months ago. It was working fine and everything until on time i to restart my computer... When i clicked on restart the screen went to "no signal" but the PC stayed on. So i turned it off by holding the power button in my case. Then I tried to turn it on again, it turned on with lights and everything.... But no display. Keyboard and mouse not working. And on the motherboard there is a yellow light that usually shows my temps. It said b7. Then the computer turns on and off by itself. It still has no display. Keyboard and mouse not working.... and the motherboard yellow light says b 7....

I suspected it to be an issue with the cpu. So i turned it off. Unplugged everything from the motherboard. Including the battery. I installed the CPU with really really hard pressure. Then plugged everything back on.. When i turned it on it worked. It showed me the message that comes up when you clear the CMOS-resret the bios. I clicked f2 to continue... it worked and everything was fine.. However every time i turned on my pc it started to show me a blue screen with a message saying "your pc ran into some problems and needs to restart, we will collect some error info and then restart for you." With a sad face on the screen. I didn't mind that. However the next day i restarted my pc because i installed a new antivirus. 

THE same thing happened again. The pc lost it's display. the mouse and keyboard turned off. However the graphics card, cpu, fans... ect... everything was on.. AND THE message was there again in stead of the temp... the yellow light said b7.................... 

SO i take everything off again. Unplug the power supply. unplug everything from the motherboard.. Take out the CMOS battery.. and install the cpu again but with really really strong force.... Because that seems to be the only way. If i install my cpu normally it would have no display with the same problem. With the b7 error and no display/mouse and keyboard not working. After i install my pc with by pushing it very hard. I also install the cooler by pressing it down really really hard on the cpu... and then screwing the screws..... I really know that its bad to press hard on the cpu.... BUT that seems to be the only way i can get the thing to work without showing the stupid b7 error. 

I then turn it on and it works just fine again and shows me the message that you get when you clear the CMOS-reset the BIOS. I click f2 and continue. It works just fine. However every time i turned it on after i shut it down for the night..... IT would show me the same message that i get when i reset the BIOS.. .even thou i never reset it anymore.... It showed me it every time i turn it on. for about a week....

Then today i went out and forgot my computer on. When i came back the computer was still on but no display. I moved the mouse and keyboard and they were on. However no display. So instead of turning it off i by mistake pressed the reset button on my case..... AND THE same thing happened. I AM really really really tired of this. Like very tired and i don't want to put up with this anymore.... Can anyone please tell me what the problem is and how i can fix it???? Please tell me. Even if its my motherboards fault... IM willing to buy a new motherboard. But i do not want to do that and then it turns out that it is my cpu's fault..... So please tell me what is causing this to happen so i can switch it out. Please and thank you!


OH and by the way my PC specs are right here.

Z97 GAMING 7 mother board.

WIndforce GTX970 4gb.

i7 4790K CPU


1TB Harddrive.

h100i extreme cooler.

Windows 7 Professional. BUT I upgrade it to windows 10. 

Edited by muesh, 09 November 2015 - 10:29 PM.

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