Hi! Yesterday a friend of mine gave me his old desktop,basically only the pc tower. He warned me that the pc is full of viruses and asked me to format the disk if possible. now the problem is this: when i connect the monitor and power up the pc, the monitor doesn't respon't at all! it is like i haven't connected it to the pc. I checked the cables and they are all in place. So I suspect that there must be a problem with the Graphics card. I checked the monitor to an other pc and it works fine! what can I do to find out where exactly is the problem? thanks for your time!