Customer has attached a DVI dongle to the display port, and has no video output.
The above symptom may occur on the following systems:
Microsoft Windows Vista
Microsoft Windows XP Professional
The system's video has the DVI dongle connected to the display port.
The System's Bios is 5CKT33A or less.
Download and update the system Bios to 5CKT34A. The system Bios can be obtained from the Lenovo Support web site.