Scanport 17" LCD Monitor "number m17fba" Questions

...Number M17FBA) Signal Out of Range My mother is trying to get our monitor to work with an older Compaq Presario with Windows XP. She keeps seeing the desktop flash for just a second, and then it says ...

...Number M17FBA. I turn it on and it won't stay on it flashes the desktop then immediatly goes back off and the power light stays on. It only did this when it was turned of for to long so I would just ...