No signal on monitor. Pc turn on, all leds are on. Fans work. Impossible to access Bios. No Beeps

[enzoli]

I'm currently struggling to find a solution to this problem.

It started after I launched an old game.

Computer hanged and screen turned black till monitor indicated no signal and going to sleep.
So I just turned off my pc manually and start it again but at my biggest surprise, the screen didn't turn on as it usually does.
Each time I manually turn on screen, it scans for sources on dvi, vga and hdmi

So when I turn on my pc now, it starts, fans work, lights are on, but I get nothing on screen. No Bios.

Since then I've been searching all around the net on a lot of forums and I've tried a lot of things but nothing seems to work.

Here's what I tried so far :
- Changing screen cable and changing from dvi to vga.
- Plug dvi and vga cables onto the mobo to eliminate gfx card problem.
- Trying hdmi cable from gfx card to my tv screen (usually worked) same thing with my mobo.
- Pulling ram off and replacing it with a different stick.
- Pulling power cable off and holding power button on for 30sec before putting the power cable back on and turning the pc on.
- Pulling GFX card out and try the onboard vga off mobo.
- Unplugging ssd and hdd.
- Jumping CMOS on mobo.

So with all theses I'm pretty sure I'm left with PSU, CPU and Mobo as possible causes. Although I'm open to any suggestion here.

Knowing this, I must precise I bought a month ago a new Case and new PSU.
PSU is a Corsair RM650X.
Since I switched to this case, I don't have beeps on my Mobo anymore. Nothing.
So impossible to use the beeps as indicators.

The rest of my Rig :
iCore I5 4570s 2,90Ghz with a Cooler Master HyperEvo 212 on it.
Asus Z87-A
2x4Gb RAM HyperX Fury
GTX 660Ti by Asus
SSD Samsung Evo 840 Pro
1TB HDD
2 case fans

I've been desperately spending hours on trying to have something back on my screen.

Any help from you guys would be really appreciated.

I can provide lot of information but can't access the computer for reports as I see nothing on screen.
I'm currently using my wife's iMac.

I probably can get some hardware parts from a friend to make some tests.

Thanks for your help.

 

[enzoli]

Update.

My mistake, there was no beep because I forgot to plug the case speaker. My bad.

So I'm left with the same problem now but with one beep for computer on and one beep after that.

 

[Dragster1254]

I have an Asus board Z170M-plus and when my pc turns on there are two beeps. It means that ur mobo is most likely fine. Can you tell me the pattern of the beeps?

 

[Tarun jain]

as far as i know my asus z97 pro gaming uses led indicators for what thing is working and what's not
..and i,too got this problem months ago but in my case the card was doing the problem as it was not able to give the digital output