Your cpu has an igp plug the monitor into the mobo and remove the gpu.
Verify you get a display.
Remove all ram but one stick.
Unplug the mouse.
Unplug all disk and disc.
So what you end up with is psu + mobo + cpu/hsf + one stick of ram + monitor + keyboard.
Power up and enter the bios and watch the temps.
If the machine freezes you swap the keyboard.
Then you swap the monitor.
Then you swap the ram stick/slots.
If it still freezes your down to 3 parts.