|I have a Lenovo T60 Thinkpad with an ATI Radeon X1300 graphics card which I have used for business for a couple of years. I am a frequent and experienced user of multiple monitors, both mirrored displays and extending my desktop to a second monitor. My issue is not related to a lack of understanding of how to set up my system to run multiple monitors.|
Yesterday my computer stopped sending a signal to a secondary monitor. I have tried on a projector and on three seperate monitors, each of which works with other computers (so it is not a cable or external monitor issue). I am neither able to mirror the display (by hitting Fn+F7) or to extend my monitor to the secondary display, although my computer believes that it is doing so (mouse can go off the side of the screen, etc). The external monitors recognize that they are plugged in, but they do not receive any signal from the computer. I am hoping this is a software issue and not a hardware break. I have tried restarting as well as uninstalling the external monitor drivers, but this has not worked. I have not tried reinstalling the ATI graphics card thus far.
One other piece of background - I used a very old CRT (probably mid-1990s) monitor as an external monitor for the first and only time several days ago, and this was the last device I connected to via VGA before it stopped working. Is there any way that this may have caused some strange setting on my computer that is preventing it from connecting to more modern devices?
Any advice is much appreciated.