Enhances the graphics driver on the PowerBook 2400 and 3400 series, running Mac OS 8.0 or earlier. These enhancements require version 1.4.2 of the "Monitors Resolution" control strip module. You should install the extension and the control strip module if you connect an external monitor or projection system to your PowerBook 2400 or 3400 and it remains black. This update will allow you to force a particular video timing out the VGA connector on the back of the machine. Note: Before attempting to drive a resolution, make sure that your monitor or projection system supports that resolution. Driving an incorrect resolution might result in permanent damage to your monitor or projection system. Any PowerBook 2400 or 3400 series running MacOS 7.6, Mac OS 7.6.1 or Mac OS 8 which needs the new capabilites should install this update.