got it fixed!
found it on the manual troubleshooting section ...
apparently, HDMI's CEC function was operating. i should have set the HDMI control to "off".
yes mark, you can specifically set the receiver to let HDMI picture pass through by setting the above to "on" (but i don't know if you'll have sound [i don't know if it's simultaneous] since there's another option to choose to output sound through the receiver or TV)
but in my case, i will never use the TV without the receiver, and i need the receiver to shutoff the switchers i plugged into the switched outlet via remote.