Disconnect any hard drives, disc drives, etc. You got to the splash screen which is a good sign, I have seen many failing hard drives or disc drives cause freezing.
Try to get the computer to complete a post and go into the bios. It could be any piece of hardware that is causing the full post failure/freeze. If removing the hard drive/disc drives did not work, remove all add in cards, pci, pcie (use onboard video if you have it). Disconnect case front usb/audio headers from the motherboard.
You can try 1 stick of ram in 1 slot only, remove extra ram. If that fails and you have a 2nd stick try that in each slot alone as well. Reset the cmos by unplugging the computer and pulling out the cmos battery or use the clear cmos jumper. These are the first things to try. While you are at it, inspect for damaged or shorting pins in your usb ports, these can cause failures as well.
Edited by zingo156, 13 March 2014 - 12:18 PM.