Monitor Question

Hi Everyone,
Proud new owner of BMCC with 4k model on order too.
Trying to make a couple of monitors work. Don't know the real brand of the moniors as they were sold under a store name.
They work fine with 60D or T2i HDMI.
Do not work with BMCC SDI "no signal" message
Bought SDI to HDMI converter - still don't work although the converted signal works fine with TV HDMI.
Any ideas on what is going on.
Just trying to see what equipment I already own is going to work.
MS
Proud new owner of BMCC with 4k model on order too.
Trying to make a couple of monitors work. Don't know the real brand of the moniors as they were sold under a store name.
They work fine with 60D or T2i HDMI.
Do not work with BMCC SDI "no signal" message
Bought SDI to HDMI converter - still don't work although the converted signal works fine with TV HDMI.
Any ideas on what is going on.
Just trying to see what equipment I already own is going to work.
MS