Hello, I'm TV Tech1 and I'll be working with you to identify and help you resolve your problem.
What is your Blu Ray's model number exactly? BDxxxxxx?? It should be listed on or around the front faceplate or on a sticker on the back of the player, depending on what year it was made.
Although the reset on my Samsung is the STOP button on the front panel has to be held for 8 seconds for mine to reset (while turned on and no DVD is installed) , Samsung does use different reset procedures on different models.
Also....some Blu Rays built in the latter half of the 2000's required you connect your Blu Ray up to the older RCA Video connections to gain access to the menu so you could actually turn ON the HDMI outputs after resetting it or downloading a firmware update.
Firmware updates completely rewrites the whole operating system, versus software updates that only modify the present operating system. Firmware requires you completely setup your Blu Ray player like you did when you first pulled it out of that cardboard box you brought it home in.
It really sounds like your update forced it back to "New-out of box" condition.
Listen, I spent about 4 hours with my 2009 Panasonic, thinking the HDMI was defective. I found out later it had an HDMI on/off switch on it.
My Samsung 2010/2011 model never needed the HDMI turned on.
And as a Technician, I'm still wondering WHY an HDMI has to be turned on or off in the first place. But that's beside the point, really. It exists on some models for some reason. That's why when I see your situation, with the NEW update that just got dowloaded....I start wondering if your model has an HDMI on/off, and what model it is.
So, ask yourself if you remember having to hook it up with the older Scart or RCA video connectors first before you could get the HDMI working.
Second, if your unit is so new that it doesn't have the Scart/RCA connectors, then consider unplugging the power cord from the Samsung, and your TV set, waiting 5 minutes, plugging the power cords back in, and UNPLUGGING your HDMI cable between the two. THEN powering BOTH back on for 1 minute....then Hot Plugging the HDMI cable back in.
Hot plugging it back in resets both ends of the HDMI connection and forces BOTH to re-establish a new connection by handshaking.
Roughly, those are the issues I have seen fix your problem.
Try those, and see if you get your Blu ray working again. If not, let me know by using the REPLY button.