Strange problem after computer crashed, No BIOS/Won't boot. New MOBO, still no BIOS/black screen

coordinated

Commendable
Aug 3, 2016
7
0
1,510
Hi all,
I'm having some major problems with my computer that happened at the blink of an eye.
The other day I was running Overwatch (a pretty light game) on LOW settings and my PC was running at about 50-55C. All of a sudden, my PC crashed. I go to turn it back on and the screen stays black. The fans and such turn on, but the GPU fans didn't. So I think 'Shit, my GPU is f*cked'. So to confirm I turned off PC and removed GPU and changed my input to onboard graphics. Not even my onboard graphics would display BIOS or boot. So I tried removing my RAM one at a time and followed that whole procedure, and still nothing. No beeps or anything. So I decide to buy a new MOBO because I inferred the problem started there seeing as how there was no BIOS (and this MOBO I had at the time was cheap and poorly made). So I get my new MOBO today, it can work with my GPU and all the specs align and such. So I began assembling the PC, and for shits I plugged in the GPU as well and Viola! The GPU Fans worked again (although I know that does not necessarily mean the GPU is working). So after double checking that everything was plugged in correctly.... nothing. Black screen. No BIOS. So I checked the monitor... the monitor still works. So I say "Okay, maybe the GPU is fried". I unplug and remove GPU and try onboard graphics. STILL, nothing. So I clear my CMOS, ram test again.. yada yada. Still, everything runs but no BIOS. I followed the mega guide and still nothing. I'm at my wits end.
I would appreciate any help... I really hope it's not my CPU that's doing this. Especially with the fact that my GPU may or may not work as well....
Here are my specs

AMD FX 8core 3.5gz
Corsair CX600 PSU
MSI 760GMA-p34 MOBO
16g (2 sticks) DDR3 Ram (1 Ripjaw, 1 Patriot)
AMD R9 270 GPU
160SSD // 1TB HDD

I appreciate any and all help
 

coordinated

Commendable
Aug 3, 2016
7
0
1,510


I wish there was an easier way to test the power supply. Sucks that I dropped cash on the MOBO and still didn't fix. Is there any way you'd recommend me checking if its the PSU? I'm assuming just going and finding one to borrow or buying one... fook.

Oh also I forgot to add that before it crashed, a day or two before my MSI Afterburner was showing my GPU bounce up and down very similar to the way a Sine wave looks. I couldn't find the cause though, any thoughts?
 

coordinated

Commendable
Aug 3, 2016
7
0
1,510



Found out my buddy has a 600w PSU from like '08. Think that'll do that job? Thank you for all of your help by the way. Very appreciated.
 

coordinated

Commendable
Aug 3, 2016
7
0
1,510


So I picked up the PSU from a buddy... he cut the CPU 4-PIN off.... ffs... literally CUT it off. It's now sitting in the box just unwired. And I don't got anything to solder with. Thanks for the help, I'll check back in when I can find a new CPU... or a soldering iron...

Update:
Soldered the wires back together. Still not output. Starting to think it may be a BIOS problem. Going to try to flash it.
 

coordinated

Commendable
Aug 3, 2016
7
0
1,510


Update 2: couldn't figure out how to flash a BIOS without having a BIOS screen. Any advice?
Starting To think the problem is CPU..
 

Samer1970

Admirable
BANNED


your CPU maybe is dead .. this all black nothing showing can happen from dead cpu as well .
 

coordinated

Commendable
Aug 3, 2016
7
0
1,510
It probably is. Sucks cause I can't decide to bring it to someone and pay $50 for them to check for me... Or to just go and buy a new one....
Ant recommendations from like ~100 range?
 

Samer1970

Admirable
BANNED


dont rush yet , make sure which part is the problem ...
 

coordinated

Commendable
Aug 3, 2016
7
0
1,510
You're right. But with this kind of problem there can really only be a few hardware problems. I've been through 3/4 of them but I'll just go to someone and ask. Thanks
For the feedback
 

PresterJohn

Prominent
Apr 14, 2017
1
0
510
After my Win7 desktop crashed during a power outage, boot order in Asus A5 motherboard got hosed and wasn't autoselecting the OS drive (would just get a black screen and text message "missing operating system"), although I could go into BIOS at startup and manually select the correct drive from the 5 listed.

After trying many different suggestions to reset the boot order, figured out by going into BIOS at startup, I clicked once on the HDD icon in the dashboard to highlight it, then F7 (Boot Menu) which gave me all my choices, then selected the P? (in my case P5) drive which was the OS, and that reassigned the correct boot drive to the icon on dashboard.

Didn't have to "save changes and exit" either for BIOS to remember the change.