I purchased a brand new set of Acer Aspire MC605 with a 24" Acer monitor. The prolbem is that when I put the pc on sleep mode and when i reopened it by shaking the mouse, the screen did not light up. I had to switched off the plug and reopened/switched on the cpu, then it's ok. The shop which i bought the pc thought it was my graphic card and changed it but the problem still exist. What is your opinions?