I'm sorry to hear that you're having this issue.
On Pg. 12 of the manual, it gives you instructions on how to change the name of the input. If your HT system is connected to HDMI-2, then switch the TV to HDMI-2 and rename the input from "----" to either "Blu-Ray" or "AV Receiver" to see if that helps.
Keep me posted.
I purchased a new blu-ray home theatre system(HT-C5500) and a new 46 inch LCD TV (LN46C530).
When using the HT-C5500 there is an intermittent white flicker on the screen. It happens anytime the system is in use (DVD,Digital,Online, Etc.) even then the player is in screen saver mode.
I also have a set-top cable box that works perfectly. I have replaced the HDMI cables and used different ports. The Cable box works with every cable in every port. It appears I may have a problem with the Blu-ray player. I have updated the firmware.