I would recommend to you the following article;
If the issue persists, you can confirm if the issue is with the IR cable with the camera test, you will find the instructions to perform this if you go here,
Let us know how that works. Regards
Not sure why Fofo had directed you to those articles, as your problem has nothing to do with the IR blasters. As I understand it your remote is not the same as before and not working 100%.
Check out this thread: https://community.sling.com/thread/3300?tstart=0
Come back if it doesn't help.