OMG I am about to pull my hair out... spent a lot of time on the phone with Marantz who went through several logical steps... I called Mistu and once I was told that 5 cable component (RGB and L&R) would give the same audio quality I could not continue with them...
what works with stemless switching
PS3 and HR21 via hdmi ---> Marantz 8003 via HDMI ---> Sharp LCD in bedroom.
Mitsu DVD (DD8049) via component + tos and HR21 via hdmi ---> Marantz 8003 via HDMI ---> Mitsu 73736
HR21 via hdmi ---> Marantz 8003 via HDMI ---> Mitsu 73736
Here is what does not work... IE will not switch back to the HR21
PS3 HDMI and HR21 hdmi ---> Marantz 8003 via HDMI ---> Mistu 73736.
PS3 HDMI and HR21 via component ---> Marantz 8003 via HDMI ---> Mistu 73736.
I am completely lost as to what to try... Essentially add the PS3 to the 736 and forget switching back (brilliant plan by Sony to monopolize the market

) I thought for sure that using the HR21 with components would work but no, same damn problem...
The Marantz guys asked me to see if my TV had the latest firmware because they thought the issue has to be with the TV.... Where do I find the firmware and what is the most recent number?
Any other suggestions would be welcome.