When i turn it on it has a blank screen - Toshiba Computers & Internet

I need more information to be able to give you the best fix, start by telling how did you came to this point and what system are you using XP, Vista, etc.) it may be just a fast issue and may be big so any information you provide will make it easy to fix and in fast way. Please do not forget to grade my assistance so I am able to continue to provide you with better service. I will be working with you to conclusion of the issues.