I have a system that uses 6 Sharp PN-R903 displays. I am having trouble getting the ON/OFF functions to work reliably. If the system is idle for a day or two the screens will not power on. If the screens are powered on with a IR remote, the system will work almost every time for a day or so. I have tried sending other commands first as a wake up and listen, sent multiple On ON ON... asked for the state of the display and then sent the ON command. Nothing seems to work. The network is a very well run college network. I even tried a simple un-managed switch in the middle of the room with 50ft cables run to the displays and the Extron units. Any ideas from any place will be tried.
Also Note: The PN-R903 Driver does not work at all, only the PN-R603 does (extron picked this for me during inital trouble shooting)
system parts list
IPCP505 controler
TLP 100MV Touch Panel
XTP 1600 Switcher
Sharp PN-R903 (using PN-R603 Driver)