You take the motherboard outside the casing. Put it on a Styrofoam. Just the power supply, processor and the motherboard. Please refer to your manual. Power it using a screw driver. You will hear a continuous beep which indicates the memory is missing, turn it off then put the memory on, turn it on again - another sound will be heard indicating a video card is missing (but other motherboard brand don't have this - other brand have a build in video on it). So for build in video, plug in a monitor, If you can see something to the monitor then the motherboard is good. In your bios find the Hardware monitor or PC health section - here you can identify if your motherboard is overheating.