I have an LH90 system its about 4 years old now and has been ok untill the last few weeks when one of the locs addresses changed to ER03.You could only scroll round the addresses untill you got to ER03 and the system would lock up.I had to unplug it and start again.It was doing this on both my LH90 controllers.In the end i took the battery out of the LZV100 so that it forgot its commands. I then put the battery back in (it neads soldering back in) and it worked fine for a few weeks.It has now started to not work on F1 so my soud locos start up and then shut down again. I had to change the addresses of my sound locos and they work ok now.With all these problems i have now replaced with an Hornby Elite whitch i find is a better controller anyway