I have a Toshiba Satellite with Windows 8. When I turn on the laptop, the fans run as though it's booting up, but the screen remains black. Then the fans slow and then run again.
Does anyone have any suggestions on how to remedy this?
Do you hear any beeping noises coming from the laptop? If there are none, there may be an issue with the motherboard. What you described with the fans may be a power supply problem too. Are you using the laptop with the power cable plugged in? Try with another power cable. If the laptop has warranty, contact the reseller.