Glad to know PLM failure can be intermittent and not catastrophic power failure (i.e. no LED) . Beginning of week started having issues with my 4yr old PLM (v1.4 1051 date code) LED light was on but dim - guess it lasted way past the 2yr MTBF. PLM would work after rebooting PLM/ISY for about 5min then nothing. Swapped with a new V2.0 PLM yesterday. Gonna order the caps to do the repair to have a backup PLM...