New Homebuilt System - Startup Problems

Right, at first I built it in 20 mins, everything connected. No problem.

Started it up a few times. No problems. Everything in the Bios fine.

Then I turned it off for a bit, and when I came back to install a OS, everything would be on, no beeping all fans running even on graphics card, except my monitor would read no signal.

I rewired everything in my case and then it turned on again. When I turned off it did the same thing again. And I have no OS on it atm. Everything is new. I have rewired a few times and its worked when ive done that.

Any ideas on how to fix this? I was thinking if it might be because the voltages or something is wrong in the bios compared to what the RAM should be running at.

Thanks

Luke.

Im sure I put it in there. I musnt of pasted properly. My bad.
Ill put them in my first post now.
And it seems after I put reconnect my mobos main power connected it comes on again. But it says BOOTMGR not found or something. Now it says ctr alt del to restart, if I just do it by the power button i can keep turning on and off and able to access my bios. If I ctr alt del it to restart, i have to reconnect all over again.

anyone have any ideas? Sorry for the multiple posts by the way.

I think it might be a faulty video card I say Rma it get a new one

Also get it running with monitor load OS and flash the Bios

I just realized it also could be a faulty DVI/VGA cable because my monitor works fine with my New DVI cord but not with the old one

Reset your BIOS again, then when the screen comes up run setup. If you can get into setup then you may be able to set your boot device order. Set CD Drive, or rather DVD Drive, to first of course. Save it and see if you can boot. If you can't boot then your BIOS is too corrupted to do anything without reprogramming the CMOS chip, which means you should RMA it. If it works then perhaps it just corrupted your default values. If you still can't install windows properly then download the latest BIOS for your board, follow the instructions to put it on bootable media, such as a CD or USB stick, reset your BIOS again, and set it to boot from whatever you saved your BIOS to. Most modern motherboards can boot up BIOS update programs from a CD or USB stick. If it still doesn't work after all that then you have a corrupted BIOS chip, so you will have to RMA it.

Argh, this is getting worse cos I dont know whats happening. I know everything is working fine and that I didnt change anything. This all started happening when I entered bios for the first time. Even though I didnt make any changes, when I tried to exit it asked me if i wanted to discard my changes and I said yes. Then thats when it started happening. And I dont have a clue what keeps on resetting it so I can see the boot screen instead of no signal.

note:::when you exit the bios even if you make no changes always save,always no exceptions,,,better safe than sorry,,,paranoia ia your friend around computers..