when I try to wake up the monitor after its been asleep for a while it makes a scratching shhhhhh noise and doesn't want to wake up. If I keep working at it it will come on. something is not right and I don't know if it's the monitor or the computer. the computer is working fine other than this problem but it could be the video card or sound card or the conection or something. any one have any idea how to tell whats going on.