Ingo,
> -scanning for new channels pops up hauppauge's channel suite dialog. leaving it starts channel scan.
This behavior is for Hauppauge VfW driver. For WDM drivers, it should not behave like this. You said you had driver version 3.27, I suppose it is WDM driver.
If you are using VfW driver, then this behabior is normal. It is my kludge on the Hauppauge cards. The Hauppauge OCX does not give me a flexible way of scanning channels. You have to use the Channel Suite Dialog and use scan function on that dialog to get your channels. When you click OK on it, MJ will take the channels from the Channel Suite dialog.
On the other hand if you are indeed using WDM driver, the explanation would be that you previously had VfW driver, and installing WDM driver did not clean up the VfW from your system (I had this problem on my system). Enumeration of video devices would always list the ghost VfW driver as one of the available drivers. If this is the case, try one of the following
1. Try right click in the video window, and see if you can find the "Devices" submenu. It should be in the top group of submenues in the context menu. In "Devices" you should see a list of video and audio devices. If you see multiple Hauppauge device, try choosing a different one.
2. If you can not see the Devices submenu (you would not see it if TV is not started successfully), try open the registry by running regedit.exe program and find the key HKEY_CURRENT_USER\Software\JRiver\Music Exchange\1.0\Media Jukebox\TV Settings. Delete the item named "VideoDeviceDisplayName" and try start TV again.