✔ 最佳答案
Check your video cable connections (plugs) between your PC and monitor. Check power supply for monitor. If all OK, try this monitor with the same cable on another PC to make sure they are both working. If not, change cable. If it still fails, the monitor is dead. If all of the above is confirmed OK. Set up the monitor with your new MB and try again. Make sure you plug it into the video port of the MB. If this fails, take the tower (with new MB) back to the supplier for service because you've done everything to prove it. Don't forget your proof of purchase.
2011-01-24 18:41:02 補充:
Read the instruction manual, there might be a switch (jumper) or something on the MB to be set up before connecting to the monitor.