This sounds like an old problem that occurs when the IP address does not match the subnet mask or the default gateway.
Since it is getting to the boot up prompt (hit enter within 3 seconds), you should hit enter and go through the boot up options making sure that the IP address, default gateway and subnet are correct. This means the they should all be in the same network mask. For example;
IP = 192.168.1.10
subnet = 255.255.255.0
default gateway = 192.168.10.1
this is wrong as the IP address is not in the same network as the default gateway.
One way to get it to come back if all else fails is to set the IP to 192.168.1.10, default gateway to 192.168.1.1 and subnet to 255.255.255.0.