If the computer does not have a power button from what you can tell, check out any thing you can open even if its like a cd drive.. if none of that works, open up the computer, the power supplie might have a switch to power on. Also check the back of the computer brfore doing anything. if non of that works, get it checked out somewhere else, you may just need a new case...
If you know anyone wanting to trash their old computer, have a broken computer they dont care about or computer parts, ill take them! even if their 20 years old, i have a computer my mom bought when i was born that i play around with still. wouldnt mind having spair parts for it.
Email me if anything Gothikaworld@bellsouth.net