I have a CE Labs HA4-3 HDMI Distribution Amplifier with the HDMI input from my receiver. The receiver gets a signal from both a DTV DVR and LG BLue Ray. The signal had been split via port 1 and 2 to a main and secondary TV respectively. THe main TV works fine, but now there is no signal to the secondary TV and the corresponding red-light on port 2 to the secondary TV no longer is on/lit up.. This signal had been working fine for over 2 years???? Why would there suddenly be a loss of signal from port 2? Should I simply try a different port (3 or 4)? Thanks!