If multiple monitors have demonstrated the same problems, and you've also tested both with multiple cables, then the issue clearly lies with the computer. Make a warranty claim with Lenovo and get it fixed/replaced.
Let me preface this by saying that I have in fact read through the previous posts on screen flicker and tried pretty much everything recommended, from uninstalling and reinstalling the driver, confirming the latest driver is installed, ending TMM, etc. I CAN get the flickering to stop when I reduce the screen resolution down to the bare minimum, (and we're talking 800x600) but that's the only solution and that's not particularly a long term solution as far as I'm concerned. I've turned off or moved anything nearby that might be transmitting a wireless signal. I've tried multiple monitors and multiple VGA cords. The flicker is a constant wiggle/ripple that's noticeable from one side of the screen to another.
Here's the system skinny:
First off, it's just out of the box. I'm running Windows Vista Home Premium 64bit with SP1 on a Lenovo IdeaCenter K230. I have a NVIDIA GeForce 9300 GE Graphics Card, and a Samsung SyncMaster T220HD Monitor currently attached. Yes, I've tried connecting my HP2159m among others and unfortunately I have the same problems. At this point I'm wondering if it's a hardware problem and if I should just send the box back to Lenovo and stop messing with it.
Any advice would be much appreciated! Thanks!