Railking not communicating with controller. Help:)

I'm thinking a problem with the Z-750 controller.  Did you also take the Z-750 to the LHS?

Does it work with other engines (if you have any)?

Do you have an illuminated lock-on or some way (multimeter) to confirm that the track voltage actually changes when you adjust the throttle knob? 

Well I first bought the remote control z 750 transformer.same issue .from what I read the train might need to be reset.(which can only be done with a manual controller) so I when out and bought one.Now I have 2 transformers.

I have a old style engine with no sound. It seems to work fine.not sure if i have a multimeter.I do have lock on light that came with the remote control transformer

I understand you have 2 transformers, but do you have two Z-750 manual controllers?  If pressing Bell or Whistle both activate Whistle, then I think there's something wrong with the Z-750 controller.  

Obviously you won't be able to reset the engine if the Bell and Whistle aren't working correctly.

I have 2 z750 transformers one with a remote one manual.i just added the old engine to the track and the new train moved forward & backward.now the bell & whistle buttons make the bell sound.I take the old train off & back to square one

Proto-2 will not leave neutral with a weak battery... Do a easy battery test..... Power up the engine and remove track power,( track is completely dead)  sounds should continue on  for at least 6 or 7 seconds.... I'd also really clean the new GarGraves track.

Just to be clear.  By Z-750 remote control you mean like below with transformer on the left (black brick), remote lock-on in the center, and the remote controller on the right.:

And by manual Z-750, you mean like below with Z-750 controller on left, and transformer on right (black brick).  In this case the lock-on is just to connect the power to the track and provide indication with a bulb that power is present.

So adding an engine to the track changes the behavior of the whistle and bell buttons...as well as now allows the PS2 engine to leave neutral and go fwd and backward.  Again, it sound like a problem with the Z-750 controller.  Does it change behavior like this when using the Z-750 remote control lock-on?  I realize there may be some fussing to connect it to the Gargraves track.

Yes this is exactly what I have.It takes a bout 10 seconds to finish shut off sounds

But do you get the bad behavior if you use the Z-750 remote version (with handheld controller)?

well some progress,not much though.I managed to reset the train, then tried the remote to no response at all. the manual now works somewhat the bell button rings & the whistle button whistles but the train is at half speed & does not always move when I hit the throttle 

Now really confused .Yes it seems the manual will only work with the lock on light.

I hope your only using one transformer here its ether or.

Don't parallel  both Transformers  

Good luck,.John 

no just one transformer.what purpose does the lock on light serve? It only seems to work somewhat with it on.