I recently got myself the X220T and it was working fine until earlier today that the screen started to flicker in Windows 7. I thought the device was hot and shut it down. After a while when it was completely back to room temperature I did a cold start. The problem is that the "ThinkPad" logo in the start of the bootup sequence seems to have changed to a off white more yellow color and have a little bit of ghosting just around the letters.
In Windows the screen would flicker and just dissapear and come back at own will.