1724 gets the slimeline 2 to turn off & on and volume then use roku remote options (star on the roku remote) then systems then power then power on then select your cable box and it will come on when you power up with the slimeline worked for me!
1724 worked for me! After spending 2 hours with Telus Technical Support and trying so many codes that did not work at all, this code worked for everything I needed Slimline2 to do. If your cable box is the last item on the tv that was on, it will be automatically selected when 'Optik' is turned back on. I have a TCL 40S325-CA and there are "NO codes for this model". Thanks Oldsparky for posting!