Installed new CPU and now my pc doesn't boot up

[Somethingformal]

Hi, I've already asked this question a week ago but after a while I stopped getting replies. I'l post my problem again below but I have already tried a CMOS reset using both the jumpers and battery. I have tried inserting new RAM and that hasn't fixed it either. If anybody has any clue I will be incredibly grateful for the help.

I recently installed a new CPU (I5 3570k) and after I installed it my PC won't boot properly. It turns on, my mobo (ASUS P86P7 Pro) LED's turn on and my fans turn on but nothing displays on my screen, and after a few seconds on being turned on, it turns off and turns itself back on again. I tried inserting my old CPU (I5 2500k) to see if my new CPU was the problem but the same thing is happening. I have tried removing each stick of RAM and trying it again with 1 at a time to see if the RAM was the problem but it solves nothing. I was also thinking it was maybe the GPU displaying nothing ( AMD Radeon 6950 twin frozr II) but my Mobo has no on board graphics so i can't really check that. I saw a thread from a few months ago with a similar problem and the solution was to update the Mobo, I wanted to try to that but I can't access my BIOS because it doesn't display anything with either CPU. I'm all out of ideas and could really use some advice if anyone has any to offer.

Thanks guys

 

[ThatVietGuy]

Pull the CMOS battery for 30 sec and reinstall.

Install the old CPU and see if it boots. If it does boot go ahead and try to update the BIOS to version 3701.

 

[Somethingformal]

Pull the CMOS battery for 30 sec and reinstall.

Install the old CPU and see if it boots. If it does boot go ahead and try to update the BIOS to version 3701.

Thanks i'll try again with the battery but at the moment the old CPU is in it currently and I haven't had any luck with that


Okay I did the CMOS with the Battery and nothing displays still, but its hasn't done a double boot for the first time since this happened

I just turned it off and on again and now it double boots again

 

[Hlias Anton]

do you hear the hdd to spin or the hdd led turn on when you open the pc? also did you put thermal paste on the cpu?

 

[Somethingformal]

do you hear the hdd to spin or the hdd led turn on when you open the pc? also did you put thermal paste on the cpu?

I don't hear my HDD spin no, but the OS is on an SSD if that makes any difference. And yeah I applied thermal paste when I installed it

 

[Hlias Anton]

well you dont have many options, i could say thats its a mobo or psu problem. Check if you forgot to connect any cable, the 1 that gives pw in the gpu and the cpu.

your ssd dont spin also?

 

[Somethingformal]

No I don't hear anything and I've checked and double checked all the cables. Im going through every again though

 

[Hlias Anton]

Well i dont think is a cpu problem, you said that already tested the new and the old.you checked the rams too, hard to be the gpu also.
so my bets are on mobo or psu.
how old are your mobo, and which psu you have?

 

[Somethingformal]

The mobo is about 2 years old and the psu is a corsair tx650

 

[Hlias Anton]

Well i am out of ideas if it can be something else, propably you need send the pc for service.

 

[Somethingformal]

Fair enough, thanks for the help anyway man. Hopefully I can take it to a shop soon. It's killing me not having my PC!