I'm so happy I found this thread and thanks so much for all the posts and help here.
My 2413S V1.0 had been running happily for a long time - years more than the typical two. A couple of weeks ago I woke up and none of my lights were working. It only took a few minutes to discover that my PLM was dead. Dang!
Well I can't do without it so I ordered a new one. Luckily I had a second one operating an EZIO8SA as a door open sensor out in the garage, so I brought that one in to keep my ISY running until the new unit arrived.
Next I opened up the failed unit for a visual inspection but there was nothing obvious wrong. Then I started hunting for help and soon found this thread with numerous people who seemed to know what they were talking about. I quickly followed the advice offered and ordered my caps from Mouser. The new unit (version 2.3) arrived a few days ago and it worked fine. Today the new caps arrived and I quickly put them in my failed unit which then came back to life, so I'm running that again with the new unit tucked away as a spare. I also have a couple more sets of caps waiting for the garage unit to fail. Maybe if I come up with a burst of energy, I'll recap that unit instead of waiting for it to fail -- or maybe not.
Anyway, thank you, thank you, thank you for all the great advice and comments here. It worked for me, just as you said it would.
One unit failed and repaired, one waiting to fail and a new one as a backup.