If you had got your Pegasus unit without any ThinkVision L1900P driver CD or the latter is lost, you may choose to follow the links below. Without a special Pegasus driver to your unit, you won’t be able to use all its Lenovo functionality. The basic ThinkVision L1900P driver from Windows is only able to support the minimum MegaBook PR601 set thereof. You are really in need of a fully-featured authentic ThinkVision L1900P driver.
For Pegasus download, please just follow the Millennium P750 link.