Re: Cable Issue - Micro USB to Mini HDMI
GoPro only offers download to a device that can automatically store the video. they offer a program called Quik for desktops and Android / IOS phones . I would suspect the video will download possibly only once per connect. The instructions state to connect the device then power up the GoPro for download. If the download works with the USB cable you have once then it should be ok. Try doing a repower as they suggest per download.
Also mentioned is a need to update to the latest software version on the GoPro.
Z10 on BES
Z10 on BIS