PC won't boot ever since I tried Duel Monitoring

[chaimek1]

Hello,
So, I have wanted to dual monitor for quite some time now and finally my dad who works for Cisco brought home a monitor which was only DVI or VGA compatible. Now my pc which I had built a few months ago only accepts DVI or HDMI. I was in luck because my old monitor was HDMI compatible.
I then decided to switch the DVI cable which I had been using for my old monitor for my new monitor and then connect my old monitor using HDMI.

Before I connected my monitors I powered off my pc. I then connected the monitors and what happened was only the monitor that was using DVI got through POST. What went wrong was that it didn't get into Windows logon screen. I then turned it off and on again and went into BIOS to see if I can change anything. There wasn't so I exited it out and turned my pc off and on again.

Now what happened was my pc didnt even complete post. Both monitors were showing No Signal and whats worst is that my pc wont beep. THe fans turn on and the light on mb shows green.

This is the checklist of the troubleshooting which I completed to no avail
1. Press the memOK-did the test but nothing happened
2. I then tested to see if maybe the internal speaker was damaged so I took out the RAM and booted up and got a series of beeps which mean no memory detected.
3. Tried booting up with only one RAM at a time to see if a faulty RAM was involved- no success.
4.I reset CMOS-no success.

My question now is- Is there anything I am missing????
Thank you to anyone who replies.

 

[nukemaster]

Does your system have onboard video you can test with?

 

[chaimek1]

Does your system have onboard video you can test with?

ill check but in the meantime is there any other solution in case that doesnt work?

 

[chaimek1]

Does your system have onboard video you can test with?

and also my pc was working fine until i tried dual monitoring; why would that happen?

 

[nukemaster]

I have never seen that happen. And in most cases, resetting the bios(assuming it is done right. Disconnect the power cord before doing that as well) solves even user configuration issues.

It would not hurt to pull the video card inspect it and then place it back in the system to ensure it is fully seated.

 

[chaimek1]

I have never seen that happen. And in most cases, resetting the bios(assuming it is done right. Disconnect the power cord before doing that as well) solves even user configuration issues.

It would not hurt to pull the video card inspect it and then place it back in the system to ensure it is fully seated.

Alright so I will reset the BIOS and also reseat the graphics card

 

[nukemaster]

Fingers crossed.

If all else fails, you may have to rest the card in a friends system or test a friends card in your system.

Could just be bad timing.

 

[chaimek1]

I have never seen that happen. And in most cases, resetting the bios(assuming it is done right. Disconnect the power cord before doing that as well) solves even user configuration issues.

It would not hurt to pull the video card inspect it and then place it back in the system to ensure it is fully seated.

and sorry why does resetting the BIOS help with the video output?

 

[nukemaster]

Most systems can be told what video card to use. If you happen to have onboard and the system wants to use that you will see no video. Most boards have a default to select the PCI-E card first so resetting is just a fast way to get back to that.

Also if someone happens to overclock a system or change another option that results in a system not posting(power on self test)/boot. The reset will give you safe defaults that should work without any issues.

I can not count the number of times pushing a overclock too far has resulted in a system not posting. Modern systems deal with this better than older ones.

 

[chaimek1]

Most systems can be told what video card to use. If you happen to have onboard and the system wants to use that you will see no video. Most boards have a default to select the PCI-E card first so resetting is just a fast way to get back to that.

Also if someone happens to overclock a system or change another option that results in a system not posting(power on self test)/boot. The reset will give you safe defaults that should work without any issues.

I can not count the number of times pushing a overclock too far has resulted in a system not posting. Modern systems deal with this better than older ones.

alright man thank you so much!
and if that doesn't work I'm going to ask my computer teacher