Hi, Read this old thread and it pertains to my current problem. Anyone get resolution to their issue?

I am not having any "noise" or "signal strength" issues. My IR543 locks up when I send it a "9" ,"ON" command from my remote. The read receive light stays on constantly ( or for more than 1 minute). When I monitor the X10 communications on the power line I see a constant "A9", "A9" .... for ever. No "AoN" is ever sent.
The IR543 seems to work ok with other commands? "2" ,"Aon" etc.

After a little experimentation I found that if passed my hand in front of it while it was locked up it would clear up? Almost like it was receiving some Stray IR? Nothing I can think of is present to issue the stray IR and the remote is pointed away from the IR543 at that point.

I moved the IR543 about 1" backwards from its current location and it no longer hangs up??? I can repeat this by moving it forward again and it starts to hang up again. Seems like stray IR reflected off of components near the IR543? Very strange.