help me pls ! ioptron cem70g upgrade firmware

[bradypo]

Help mainboard cem70G

I believe that my motherboard cem70G cell does not work very well, I connect the ioptron usb cable directly to the pc, this sees it very well as com3, but it does not allow me to do a firmware upgrade, only Hc updates but why is it connect directly to the pc without going through the mount, I wrote to ioptron let's see what they respond, but in my opinion it is the mainboard  to change,I tried various usb cables, I tried with other previous firmware, I wrote to ioptron, but it still doesn't work, someone had the same problem, I read the post of one who had similarity problem with the cem60 but it is different in electronics from mine , thank you all

[newbie alert]

With the cem 60 you have to connect the rs232 to the mount and laptop/ pc for the motor control board 

And the handset to laptop/ pc for the other if I remember correctly