Should  there be a firmware upgrade after installing hdmi upgrade board?

Nope.

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u should upgrade to latest fw ayways. what fw r u on? and support for hdmi has been written into the fw already

I didn't think so.....but after installing hdmi board I wanted to do a quick test flight. When I did dji go app said rc firmware required so I did that then it installed the firmware. Then it said to restart rc. When it came back on it now says firmware update required for the bird. Had latest firmware on bird and remote and even flew earlier in the day with no problems.  Have never experienced even one problem after 140 until now. Should I just do a firmware upgrad? Thanks in advance