Monitor Losing Signal

[rafiki]

everytime i turn my pc on i works for a short while then all of a sudden Poof Monitor turns to no signal screen for no reason. i dont think that the gfx card drivers are installed (due to me not knowing which card is installed) any ideas on how to fix it?
Thanks in advance
Rafiki

[tyanque]

it might be the cable, that happens with my monitor sometimes :p, you jst have to fiddle with the cable, i should really buy a new cable aha :p. I might be wrong but thats the solution in my case.