Windows 7: Monitor has no signal when plugged in to graphic card slot(dvi)

Well i purchased a new PSU and GPU both links here Newegg.com - ASUS EAH6670/DIS/1GD5 Radeon HD 6670 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready Video Card
Newegg.com - CORSAIR Builder Series CX430 V2 (CMPSU-430CXV2) 430W ATX12V v2.3 80 PLUS Certified Active PFC Power Supply
and i have pavilion a6000 desktop (pretty old i know)
i installed the graphic card and plugged the dvi adapter into the graphic card and vga into dvi adapter and plugged the other end into monitor vga slot, so i played Wow everythingh on ultra was really happy for 3 days straight when i restarted my computer and THIS F(*$*#@ happend "No input signal" Monitor says. well i unpluged all cables tried to fix the problem no luck. yesterday i was trying to fix the problem for the WHOLE day!
so I did the pci-e thingy in BIOS and cleaned the pci express slot and firmly stuck into the slot whole plugged it in again no luck... BUYING NEW MONITOR! but first have to ask you guys any help please?

Hello and welcome to the forums, antonice22!

Have you tried using a different monitor or TV with your computer to check whether it's your monitor or the graphics card's fault?

What is the make and model of the current monitor that you are using?

Also, please fill up the rest of your system specs by following this tutorial:-

System Info - See Your System Specs

Yes i have, i am using a different slot to view the monitor which is on board display motherboard vga slot. well i think its the Graphic card fault because when i boot up my computer it beeps 7 times but when i remove graphic card it doesnt beep on start up..

cpu-AMD Athlon(tm) 64 X2 Dual Core Processor 5000+

motherboard- ECS Nettle2

BIOS-Phoenix - AwardBIOS v6.00PG

UNKNOWN MEMORY-8gb

HDD-ST340082 0AS SCSI Disk Device

Sound card-Realtek High Definition Audio

Old Graphic card-NVIDIA GeForce 6150SE nForce 430 (Microsoft Corporation - WDDM)

OS- Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1

NEW-Graphic card Asus radeon 6670 1gb ( PSU required 400 watts )

PSU-Corsair 430 watt powersupply

Monitor works

Okay, to make sure we understand each other, what you meant by your first statement is that you have now unplugged your monitor from your GT 430 card and are now using your integrated 6150SE card, and the monitor works fine on the 6150 integrated card.

For your second statement, what you meant was that the computer beeped 7 times when you had your GT 430 card installed, but did not beep when you took the card out.

So, you now believe that the monitor is not the problem now.

Is what I just mentioned correct?

Oh I'm so sorry to mention this ( or I did mention) but I have build in display and I bought a NEW graphic card and the monitor doesn't work when plugged into it, so in this case my new graphic card doesn't work since it gives no signal to monitor. But when I unplug from new installed graphic card slot into build display slot it works, which means that the monitor works. I'm using dvi to VGA adaptor for plugging my new graphic card into monitor. I'm thinking of buying a new dvi cable but it's hard to find because it's old.. So do you get my question? If not tell me and I'm really sorry if so

Okay, I think I understand you a little bit more.

When you start up your computer using the 6670 in the slot, did you check to see whether the card's fans were spinning, and could your BIOS detect the card?

You also mentioned in your 1st post that you did a PCI-E thingy in your BIOS, what do you mean by this?

In bios I ( on boot up i press f10 and enter setup) and change the video adapter from onboard to pci-e slot so my computer well know where my graphic card is located. And yes my fan is spinning on my new graphic card but it seems to give no signal to monitor, it's really strange because It worked a day ago perfectly fine..

Thanks for answering my questions.

So it seems to be more of a monitor detection issue then.

You did not mention in your system specs what the brand/model of the monitor is.

Who is the manufacturer of the monitor and what is its model?

Hmm, you really think so? Monitor itself is the issue then hmm, I'm going to buy a new monitor then.. Oh sorry I think it's LCD 19 inch hp monitor year 2007 I think . I can't check because I'm in bed with an iPhone .. So what about if I buy the dvi cables and plug both VGA and dvi cables?