I hope this is an appropriate forum to post this ....

I have a three way splitter under my desk which splits my Rogers signal for Home Phone, internet and cable. When I plug in the coax for my cable box, I get picture on my TV (computer) but then lose my internet connection. When I unplug the cable box, the internet connection is restored. I would like to have all three. Back at the cable entrance to the house I think there is also a three (or four) way splitter. Any words of advice?

The internet connection should always be the first split inside the home with a two way splitter. The TV connections can then be split downstream of that. See the following threads:

http://www.digitalhome.ca/forum/showthread.php?t=78810

http://www.digitalhome.ca/forum/showthread.php?t=80319

Sorry, don't know where home phone fits into this, but I assume they took care of that properly when installed?