So much information!
Tell us about your system.
What processor model number?
Do you have an add-on graphics card? If so, what card and model number?
What Operating system?
Was the PC working BEFORE you changed something? If so, what did you change?
When you see the POST Code value reach 0 (zero), it means that BIOS POST operations have completed successfully and the BIOS is transitioning into the boot process. A hang at this point means that there is a problem with the boot image and/or the boot device and/or motherboard components (like memory)
As Al asked, what changed? What did you do just prior to the problem occurring for the first time? What O/S is the board trying to boot? Please answer all of the other questions asked.