I think I might need new phast switches
I bought a house in 2006 that had a Phast Landmark lighting system that was installed in 2000. The system has worked fine until now but recently several of the light switches don't seem to work right. The LED on the switch will stay on but when I press the switch to turn the lights on, the LED goes off but the bank of lights won't turn on. I can never get the lights to come on but the LED eventually energizes and stays on until I press the switch again. I have the following switches in my system and this is happening with what seems to be random switches. Switches are: PLL-SD10, PLL-MLS and PLK-SB2. This is controlled with the PLC-MCU4. Also, something I just thought of is that I recently replaced several of the 100W incandescent bulbs in the system with some 20W LED bulbs. I didn't know if the circuitry in the LED bulbs may have caused problems with the circuitry in the switches.
First of all, can you help me diagnose what's happening with the switches and then do you have the switches I've described if I need any? Thank you for any help you can provide.