Hi,
Here are some troubleshooting steps that may help.
- First is to do a hard reboot, remove the battery and unplug the AC adapter then press and hold the power button for 20 seconds then try booting it up again.
- If it will still not work and if its still stuck on the ASUS logo, remove the HDD off the laptop then boot it up with it off the laptop.
- If the laptop will load pass the ASUS logo without the HDD and load into a black screen with an error that could mean that the HDD is faulty.
- But if the laptop will still get stuck on the ASUS logo that could mean that the problem is the motherboard.
- Do try reseating the RAM's, remove them all for couple of seconds then put them back in making sure everything is seated properly.
- If it will still get stuck on the ASUS logo, last option would be to remove the CMOS battery for seconds then put it back in.
- If all these will not work, do contact ASUS for a repair specially if it's still under the factory warranty.
But if the laptop will get pass the ASUS logo with no problem with the HDD still connected I would suggest reinstalling Windows.