Well, I'd check to see if the powersupply fan is working. It's in the back of the computer towards the top. If it's spinning poorly, or has a burning smell coming off it, I'd try a powersupply, new cheapies are $16 and up, I got a used 250w for $3.00 from a local PCrecycle store. Check to see if there is an led lit up on the motherboard, most have some red led that indicates power and Make sure the cpu fan is spinning nicely at turn on. Led might be mentioned in the motherboard manual. If you have it, and it's not lit up, powersupply or motherboard, if you need a motherboard, I'd upgrade. If cost is an issue, try finding a pcrecycle, they shouldn't be too expensive and the store here has a 30 return even on the used stuff. If all that's ok, I'd get a video card from a pcrecycle cheaply and hope that works, then try a different sdram stick. Good Luck.. If any of you local stores have a computersource magazine, they might have used shops in there.