Screen goes black.

[Eni Mkb]

My pc is equiped with:Gforce 8800,i2 quadcore,2gb ram(32bit) and it runs on windows 7 ultimate.Whenever i turn on my computer my screen works but only for 3-4 seconds then it goes black.I tried to use another monitor/screen but had the same problem.I think its a graphic card problem since its pretty old but im not sure about it.If u think its a graphic cardomend me problem could you please recommend to me what graphic card i should buy?(Consider that i dont have much money since im only 14.)

 

[Rams Anirudh]

It could be a Graphics card problem, but to make sure you can remove it from the computer and use the display output from the motherboard and start computer, if you are not getting black screen then issue is confirmed. You have to get a new Graphics card.
To get a new graphics card you have to tell your budget so we can suggest a good one

 

[Eni Mkb]

It could be a Graphics card problem, but to make sure you can remove it from the computer and use the display output from the motherboard and start computer, if you are not getting black screen then issue is confirmed. You have to get a new Graphics card.
To get a new graphics card you have to tell your budget so we can suggest a good one

I will try that out but right now im totally confused,I changed my monitor i connected the wires and the same thing happend(obvious).Then i connected my laptop with both monitors and the same thing happend with both monitors(black screen).No idea whats going on