Toshiba satelite 1800-750 startup problem!

[getrigege]

since my Toshiba laptop satelite 1800-750 HDD failed,the laptop has being experiencing Startup problem.I Changed the HDD,after a lot of trials,it started,and i was able to format it and install OS(win XP).But for the past 3 days the laptop has not been able to startup again.When i press the switch botton,the power indicator lights up ,but nothing shows up on the screen(i.e a blank screen).Am confused,can any one help me out..!

[Carbon Dudeoxide]

Can you boot from the Windows CD?

[getrigege]

the laptop does not show anything on the screen,and it is starting up to give u the option to boot from cd.I want to know the problem why it is not starting up..That is my concern for now..

[Carbon Dudeoxide]

You say the indicator lights come on but the screen remains blank.
Does anything else come on? (The Fans, HD, ect...)