So my friend gave me his friend's Dell Inspiron 2305 AIO PC to fix. The problem with it is that there is no video output, even though it turns on and everything. Fan spins, lights are on and everything, just no video output. There's no VGA nor HDMI port, so I can't exactly test if it's just a bad monitor or something. While I'm waiting for my friend to arrive with the proper screwdriver to open it, does anyone have any idea what the cause of the problem might be?