"No Signal" on TV connected to Mini with HDMI, in spite of Mini and TV HDMI both working with other devices ---- what's up?

My TV shows "No Signal" when connected with the Genie Mini, but 2 separate computers, 1080p and 4K both work fine with the TV HDMI input.   Resetting the Mini shows "This will take a minute" (or whatever) in lo-res, but then "No Signal".   When attaching that Mini to another smaller TV, it outputs through HDMI OK.   When I try a Mini from another room with the problem setup, it also results in "No Signal", in spite of that Mini working fine elsewhere.  So everything works in some setting, but never a Mini attached via HDMI with that TV.   Switched cables with one provided by DIRECTV.   What could possibly be left to try, please? 

What year/brand/model TV? 

Seems like that TV doesn't like the video resolution being output from the Mini Genie.

Hisense 70" 70A6G - forgot to mention this worked OK for a while, then had trouble, reset Mini, restart Hisense fixed for a little while, then "No Signal".

Thanks . . . unfortunately . . .

I'm betting the prior suggestion didn't work. That or something else happened. Just my guesses as you didn't say anything definitive.

Verify that neither your DirecTV box or TV is plugged into a "smart" power strip. Also make sure that HDMI-CEC on your TV (if it has it) is turned off. These features tend not to play well with DirecTV equipment.

Check resolution settings on DirecTV box.

As it is a Client, reset the main Genie.

Verify coax is finger tight to both main box and Mini Genie.

Try a different HDMI port on TV or even another HDMI cord.

Does that Mini Genie work fine on a different TV?

What are the models of both main Genie and Mini Genie?

@Juniper 

OP tried the questions you mention to no avail since they state they tried troubleshooting in the original first post. However the smart power strip and HDMI-CEC troubleshooting definitely could gear toward a solution.

I'm betting the prior suggestion didn't work. That or something else happened. Just my guesses as you didn't say anything definitive.   UNPLUGGING TV FOR SEVERAL MINUTES DID NOT HELP.

Verify that neither your DirecTV box or TV is plugged into a "smart" power strip. Also make sure that HDMI-CEC on your TV (if it has it) is turned off. These features tend not to play well with DirecTV equipment.  NO "SMART" POWER STRIP EVEN AVAILABLE.  HDMI-CEC WAS ON AND WORKED OK A WHILE AGO, BUT TURNED OFF AFTER MINI HDMI FAILURE.

Check resolution settings on DirecTV box.   OK, DONE.

As it is a Client, reset the main Genie.   WILL TRY AGAIN.  DID NOT HELP A WHILE AGO.

Verify coax is finger tight to both main box and Mini Genie.  TIGHT ON MINI AND MAIN BOX.

Try a different HDMI port on TV or even another HDMI cord.   TRIED ALL 3 PORTS, AND 3 DIFFERENT HDMI CABLES, INCLUDING ONE PROVIDED BY DIRECTV>

Does that Mini Genie work fine on a different TV?  YES

What are the models of both main Genie and Mini Genie?  WILL GET THOSE.

THANK YOU.

@detuch254 

Yeah was dealing with some eye strain so I didn't read the original post entirely correct. Thanks for catching me up on what I missed.

Hi again,  my equipment

Master  HR44-500

Mini  C51-500

Any thoughts?  So weird.