Legacy base stops working and goes conventional

First off a legacy base can not run trains conventionally, trains receiving, no signal from the base typically "take off at full throttle". If the headlight has a steady blink when the train stops this is an indication of signal loss at the track, but are still recieving it from the base. The easy things to do is make sure your track and wheels are clean.

If the base is plugged into an outlet strip try plugging it directly into the wall outlet, some outlet strips can cause signal issues, one side of the legacy signal is transmitted through the ground lug on the base plug through the ground wiring of your "train room"

Be sure to power up the legacy base first, then the track, a delay in base powering means the loco can't find the signal initially.

Is your TMCC base connected through the legacy base as Lionel recommends? If not  the the seperate TMCC base and Legacy base connections can create signal issues as well.

Have you tried disconnecting the TMCC base and unplugging it and then seeing how legacy reacts? 

Rick,

Thanks for the reply.  I will take a look at your suggestions.  I do run the TMCC Command base hooked up to legacy using the way Lionel recommends.  I will try this for a while with it unhooked.   This problem seems to happen at occasionally, so I will need to observe this more.  I will inspect all the TMCC/LEgacy engines to make sure their wheels are clean and clean / inspect the track.