Playback Issues - Audio/Video & Power

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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Level 7

LG TV turns on for a split second, then turns right off with Roku remote

Two nights ago my Roku Streaming Stick+ stopped powering on my TV.  Well, let me clarify. 
It DOES power on to allow the the HDMI words show up for a few seconds, then the TV powers right off.  The remote does work.  I have an LG (maybe 10 yrs old?) and bought the stick back in July this year. 
It has worked flawlessly until now.  I unplugged and plugged the HDMI cord at the TV and did the same for the stick at the back of the receiver.  I restarted my computer so the wi-fi would restart.  Still does not work.  Do you think my stick went bad?  Any suggestions?
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