I need your expertise. After moving my computer from one cubicle at the Makerspace to another, I plugged in the monitor to the computer and it wasn’t receiving a signal from the computer. The monitor still works as I tried it with my other computer and it worked. I read some things on the net that said it was the graphics card, so I bought a new one. Unfortunately, the connector doesn’t fit with the monitor, so I will likely have to return it. Is there a way I could diagnose and repair the problem on the motherboard, or should I just reorder another graphics card?