Hope someone can help, the more I Google the more confused I become....

I have a dual LNB setup with D1 on one and Intelsat 19 on the other with 4 port DiSEqC and Ultraplus receiver. All was working AOK. (Best thing I did this year was ditch Sky)

Have a family member here for a few months and wanted to add their Sky box for them, so installed a (old) splitter after the DiSEqC switch.

All works except I can not get a signal on V polarity TPs on Intelsat 19, hence no Nine Network. H polarity seem OK though.

If I disconnect the Sky box all is OK.

Is it a setup issue with the Sky box? DiSEqC or tone? Google says V and H polarity use different voltages.

It's all just a little beyond my rudimentary knowledge.

Thank you for your help.

Ruatuki