So, I was having trouble using a cheap MCE remote to control my Xbox 360 as an extender. It seemed like it was interfering with my TV IR, as the IR receiver on the TV would flash while pressing buttons, and it would take multiple button presses to register any command on the 360 (and sometimes not work at all).
Being a Harmony One owner, I wanted to buy a Harmony remote for the bedroom, but didn't want to spend a ton of money. So I picked up a cheap Harmony 300, hoping this would solve the problem and allow me to control both TV and 360 on the same remote.
Well, with the Harmony 300, I seem to have similar problems... though they are less pronounced, it seems as if the interference is still there. I have the Harmony 300 mapped as "Microsoft - Media Center SE" I believe, and my TV is a TCL 40" LCD. It takes multiple button presses to register a command to the 360, and the LED on the TCL occasionally blinks while pressing a command for the 360.
Any thoughts or advice? It is quite annoying, especially when it decides not to function while rw/ff!