Hi. For presentations we use a data projector and an additional 15" TFT monitor, fed by a laptop through a video splitter (Black Box). Up until now everything has worked OK. Now, for some reason the TFT has stopped diplaying anytting after the boot-up windows logo (This shows on the screen but thereafter only the data projector displays, not the TFT).

Info.
Our OS is Windows XP Home | we use the multiple monitors setting | we have not reset any settings so cannot work-out why this has shappened now

Any suggestions about how we can recover the TFT in addition to the data projector image? Thanks.