Seetec 7 Inch ST-702HSD HD LCD 3G-SDI HDMI Camera Field Monitor for BMCC/BMPC/BMPCC/Micro Camera

I bought this monitor when i had 5d mark 3, because it had Sdi in and out and claimed to work with Blackmagic cameras I paid extra around bucks, total of $450 with shipping, around 2 years back. HDMI worked fine , then i switched to blackmagic ursa mini pro and tried Sdi but it didnt work , i tried evrything even bought micro sdi to hdmi converter by blackmagic , still didnt worked. One time accidently i changed the frame rate to 60fps and it worked. Sadly i dont shoot 60fps all the time , i shoot 24 or 25 as project setting. If anyone from seetec can help me with this, maybe a software update, could make it work. Thanks