I have a laptop that you can power up and fans come on and stuff but getting no POST on start up. Does this mean the motherboard probably went bad?
Several things can cause this.
First thing to try is a hard reset:
With the laptop powered off disconnect the AC cord and remove the main battery, hold the power button down for a full 30 seconds, connect ac cord Only, power up and see if it will post.
If this does not get a post, try removing the memory module(s) and re-seat them, if this does not help and you have more than 1 memory module installed try each memory module one at a time.
If none of this helps it is a more serious issue and most likely a completely corrupt bios or faulty motherboard or hardware attached to the motherboard.