I've replaced the Intel Core2 Duo T7300 @ 2.00GHz CPU in my Dell latitude D630 laptop with the Intel Core 2 Duo T7800 2.6 GHz Dual-Core Processor(a compatible upgrade, according to Dell documentation). Every thing seemed have gone just fine until I hooked it up my docking station. The CRT external monitor no longer works at all at the BIOS level. I can watch the boot process on the laptop screen, but the first thing I see on the external monitor is The Windows 7 Welcome Screen. Since I leave the laptop closed, it's critical that I see everything on the external monitor. It works all right in Windows except that I can't get various resolution to work the way they used to using the controls on the monitor (can't stretch the desktop to the edges of of screen). I get the same result whether I plug the CRT into the docking station or directly into the laptop. I don't see any BIOS settings that would be relevant. My BIOS version is A17. There is an update available but from what I've I read, it seems very unlikely to make a difference. Obviously, though, there is something happening at the BIOS level. I'm completely baffled. Does anyone have any idea what might be going on?