OK so I have a Toshiba Satellite Pro A300-28R with Windows 7 64 bit and an ATI Mobility Radeon 3470 HD graphics card.
I recently connected my laptop to a TV via the S-video connection. This worked fine. The problem is that ever since then every time I start my laptop Windows starts with the S-video display resolution of 600x800.
I have tried changing the settings in both Control Panel and using the ATI CCC, having both selected and applied these settings but each time Windows starts now it boots with the above display resolution.
Following this I have also uninstalled and reinstalled both my display driver and the Toshiba Value Added package but the same problem persists. I have searched with Google about this problem and haven't been able to find anything useful.
Hi thanks for your responses! Originally I used the method of closing the laptop screen while connected to the s-video and then opening the screen and logging into Windows. This then automatically detects the display and changes to that output. To get out of this you can do either do the reverse or pres Fn+ F5 to undo. This has worked perfectly for me before with VGA connections. Its only since connecting to s-video that now no matter what, every time the laptop starts up even when it is not connected to any external display, it loads with the resolution 800x600. This is not the first time I have used s-video, but it is the first time I have had this result after doing it.
Interestingly if I change to the appropriate resolution and do a restart. The system restarts and loads to the logon screen and then into Windows in the resolution I specified before the restart but then after fully loading Windows it then changes to 800x600. It is as if the laptop is detecting that there is something connected to the s-video when there is not. I have read a fix for this whereby you can go into the system registry and turn off the feature for automatically detecting displays but I use external displays frequently and this is not a satisfactory solution. This worked perfectly before.
Hi Mike, as stated in my original post I have already re-installed my display driver, twice now. Am beginning to think there may be something setting off the display detection on the notebook, dust or something. Am going to try getting a vacuum or compressed air can to it.