Computer wont boot up but everything seems to work

[Lars Santiago]

My computer randomly froze and forced me to restart it and now won't boot up but everything works and lights up in the pc itself.
The monitor either just doesn't recognize my pc is trying to boot up or my pc isn't booting up but it's still on.
Everything is powered so I don't think it's the power system. My motherboard lights up when I boot the pc on. I've changed out my CPU twice and all 3 hours don't work. All 3 light up and the fans work as Well.

I've also reset my cmos and took the battery out and put it back in.

I think I've narrowed it down to two things, either my cmos battery is dead and I need a new one. Or my processer needs to be changed out.

Did I miss anything? Any known fixes or anything that would help.
If I buy a new cmos battery could that fix it?

 

[R_1]

what is the motherboard telling you? is the speaker connected to the motherboards panel connector?
Any old speaker will work I have used a shelf speaker and bits of wire. the motherboard may be telling you what is wrong, the speaker has been for many years the main diagnostic output for the motherboard.
Get a speaker hooked up if not already, then try to force a beep code. Remove the RAM from the system and the motherboard should go beep crazy. without RAM my board beeps 5 short beeps, pause, and repeats. your diagnostic beep will vary depending on the motherboard.
If you cannot force a beep code in my experience the motherboard is dead.

if the CMOS battery were dead the system would still boot up, you would just have to reset the BIOS/Clock settings on every boot.
what are your specs?

 

[Lars Santiago]

My motherboard beeps. Went and bought a motherboard speaker and went I took the ram out it beeped

 

[Lars Santiago]

Sorry double post. When I stuck the ram back in I got nothing out it

 

[R_1]

without RAM the motherboard gives you a beep code? that means the motherboard looks to be functioning. Its not the BIOS battery.
CPU seems likely. check your motherboard manual, look for the beep codes. if the board has a code for a no CPU, test it. Remove the CPU and boot like with the RAM. does the motherboard confirm no CPU detected with the right beep code?

 

[Lars Santiago]

Looked up the beep codes for my motherboard and it does not have a code for a bad cpu. I managed to find an old CPU and an old motherboard that I know works and it still does not work with the other parts.
I'm going to try swapping out my gpu again but mine is fairly new and I believe I tried it already.
My specs are:
CPU: amd fx 8370
Motherboard: asrock fatality 990fx killer
Gpu: Nvida GeForce gtx 980ti
Psu: evga supernova nex 7590 b
Ram: 4 8 gig ripjaws

 

[Mikel_4]

could be psu or mobo,
There's nothing you can do if it is mobo faulty unless you're god damn good solder man. If it turn out to be PSU faulty just replace it.
1.
remove all but CPU GPU and 1 RAM, if you got video signal then enter BIOS, down clock CPU and RAM, save and exit, if no video signal, turn off unplug power, clear CMOS, turn on and enter BIOS, save exit, we'll need to load windows, run program until freeze or shut down, turn off unplug, touch the CPU heat sink, if you feel somehow really hot the its good, if not:
replace thermal grease.
2.
learn how to use digital multi tester, find out each connector output wattage, reference wattage at http://www.playtool.com/pages/psuconnectors/connectors.html, if your PSU is good then either graphic card or motherboard is no good.
Check your motherboard PCB, compare with online image, see if you can spot unusual such as bulking capacitor, loose pin, flimsy surface, scratch mark, etc. FYI I still use very old asus GTX 280 for testing.

 

[Lars Santiago]

So I figured it out, it was the motherboard. Just died randomly I guess.
I went out and got a cheap processor and motherboard to try and figure it out. Turns out the mother board was somehow broken even though it could signal beep codes to me.
Thanks for all the help