Electrical Issues

[Plumsun3]

I've been experiencing issues with the slideouts on my 27.5 htls camper. 1st experience was when I checked camper out a month ago for upcoming visit to Disney. The power awning would not work but I opened both slides. A few days later the one larger slide also refused to work. Knowing camper over 5 yrs old I suspected the battery. I replaced it after fully charging it. No change but the other large slide still worked as did the small one in bedroom. Trailer has been plugged in to keep battery charged. Yesterday I was going to pull camper out from behind fence onto driveway, now the bedroom slide won't come in but the one larger one worked fine.
I'm perplexed. I'm going to check out battery again and thought maybe even hook power up to my pickup.
Anybody have issues with the Progessive Dynamics converter management panel.
Guess are all good.