When you turn it on do you get anything like the acer logo to appear and then go black? How old is this laptop?
I would say there is a hardware issue somewhere. With this being a laptop, its gonna be harder to track down. First thing I would do is unplug charger and remove battery from laptop if possible, then press power button and hold for 10 seconds. Reconnect everything and try booting up. This procedure may have reset the cmos.