Lionel TMCC Mikado Loss of function tried reprograming... No change

It would help to know what locomotive exactly.  What's the Lionel product number? 

What did you mean by.

@redbarchetta81 posted:

I had one of these 10 years ago that I sent to have repaired and wasn't able to recover it.

You sent an engine to someone for service and they kept it?

The box end says 6-38616. No ,they didn't keep it, I waited 7 months and had to go into rehab , and it was around two years before I could even consider financial " wants" as opposed to needs. I contacted them , and they had sold it for the repair costs because they couldn't contact me. 

This is the Mikado Jr, right?

There is no LCRU in this one, it uses the R2LC with the modular board system.

Let's start with what the exact symptoms are?  Do you have lights?  Do you have Sound?  If you can check, does it draw ANY current when you power it up?

Absolutely no response. I've pulled the batteries out of the Cab-1 pulled the crystal and unplugged the PH-1, the Command base, and the only other thing I haven't done is unplug the TMCC direct Lock-On ( I no longer use a PM-1). The direct lock on responds normally, ( red lights, and then goes to green ). I use an SC-1 for the turnouts, and it operates normally. 

No lights on the Loco, no sound, although the tender works with my other TMCC locomotive. 

N Pete, absolutely dead . 

Sounds like a power failure or maybe the R2LC is out of the socket.  Since you've already been in there, open it up and check for any loose wires and/or connections.

If it were a power failure, what would that entail in regards to repair ? 

Could be as simple as a loose wire or connector, can't say without seeing it.  There's nothing in there that's super expensive, the two boards are pretty inexpensive.  Since you've said the tender is alive, I don't see this as a big issue to fix.

I live in Southwest , Virginia ( Bristol). I don't know of any service centers near me. Do you have any suggestions ,John ? 

When I said the tender worked. It comes on when coupled and plugged into the Locomotive chassis, but there is no tresponse from the buttons on the Cab-1 . It just sits and the sound is like @ idle. No whistle, Bell , CRWTLK , or TWR Com .

You tender has its own pickup rollers. That means you should get sounds if its not wired to the engine as soon as it gets power. If you get no sounds when the tender is connected to the engine it means its seeing serial data. The R2LC is getting power. 

Remove the engine shell and remove and reinsert all the connectors as John suggests. Its just four screws. Remove the shell carefully so you can unplug the antenna wire. With the shell off the engine will operate if all the connectiona are good.

Pete

@redbarchetta81 posted:

When I said the tender worked. It comes on when coupled and plugged into the Locomotive chassis, but there is no tresponse from the buttons on the Cab-1 . It just sits and the sound is like @ idle. No whistle, Bell , CRWTLK , or TWR Com .

Unplug your command base, bypass your lockon and try to run it with the transformer. Its sounds like your Cab1 is dead.

Pete

Pete,

I've done that its a bare chassis, and still no life.. I'm afraid its dead. . 

There is black two pin connector that plugs into the motherboard. That provides track power to the boards. Make sure its fully seated. 

Pete

Cab-1 is fine. I just coupled the Mikado Tender to the Pacific 4-6-2 ( U.P), and everything functions normally. Will it hurt it to run it with a transformer ?

You can run any three rail engine with a transformer. Just make sure the command base is off.

Pete

Won't run in any combination. Tried bypassing and running straight with a transformer. Still, no luck. I didn't mess with anything outside the smoke unit, and replacing the headlamp. Like I stated earlier, it worked like a charm until I put the shell back on. There was a composite washer that sat between the top of stack, and the shell, and I forgot to replace that, but even then, I had electrical tape trimmed around each half of the smoke unit for insulation. 

The washer on top of the smoke unit is only to try and keep smoke fluid from leaking inside the engine. The smoke unit itself is connected to chassis ground. One side of the smoke resistor has insulation around it. It goes to the R2LC. If that insulation gets exposed and shorts to the smoke unit or shell it will take out a triac on the R2LC but usually you only lose smoke, not all other power.

Pete

Yea have a conventional steamer when ever I take the shell off to work on it. Usually to do work on the puffer type smoke unit. When I put the shell back on sometimes it won't run or will short out. Think it ends up being one of the wires on the smoke unit is grounding out to the metal body on the engine. It also has the felt gasket on top of the smoke unit. Usually takes a couple tries to get everything right when putting the shell back on.

I have no idea outside of that as i had new shrink wrap on the resistor side of the smoke unit. On this particular model, Lionel went with some kind of different ( to me ), anyway smoke resistor, and used a kind of green " bean" type of resistor, there was no insulation around the canister of where the " lid' conical shape that goes on top, and the previous model of one of these that I had exhibited the same behavior, smoke quit unexpectedly, and that was the reason for me sending it to a service center. I have replaced all kinds of the Pacific types (99') model 6-18086, and the newer 6-28000 series Pacifics and the Hudsons of that type, and they are an easy replacement. These are altogether different.