Okay so here is the problem i have a cheap pc with on-board video card. The monitor and cable are working because i've used them before. I think something is wrong with the vga-port on the motherboard. When i try to connect the cable to the port i can slightly press the vga-port back inside the case. However i do not know if this is causing the problem because when i looked inside the case everything seemed fine, and the cable still goes into the port in a good way. The monitor gives the message 'no sync' and black screen. computer boots and all, just no image on the monitor. I have already done some research on this saying i need a pci-slot video card but on the back there is only a vga-port and not for pci. Another solution i have read about was the usb to vga adapter but im not sure if this will work so i dont know what to do please help me.