Did your engine come with a "magic wand?" That's a magnet that can be used to activate a reed switch in the engine/tender which performs a hard reset. I think some of the QSI's had that option.
The right thing to do is to hook up your DCC system, though. Hey, dude, get out of the DC Stone Age, anyway! My original plan was to set up my layout so that I could "ease into" DCC, leaving part of the layout on DC, and part on DCC.
After 10 minutes running one train around a loop on DCC, I pulled out the wires from the DC powerpack and put it away. I was smiling like the 12-year-old who bought those trains back in the 1950's. You'll never go back. It's not like "you can't go back," because you can, but why would anyone want to? Yeah, DCC really is that good.
It takes an iron man to play with a toy iron horse.
Sometimes the QSI decoders go to sleep when they are not called up actively on any one throttle during a single operating session. This happens to me with all my QSI's, but most certainly to the older versions pre-upgrade chip availability. To get them to respond, you can first dial them in by address, and then activate the encoder/throttle knob...they'll sometimes agree to play that way. Otherwise, try the F8 to see if they were inadvertently muted. If those two fixes ...don't...try a press of F6, which brings the decoder out of an F9-induced shutdown.
Failing that, you must set three different CVs to certain values to effect a hard factory restore to the decoder. First, make sure you are only signalling this reset to the one loco. Step one is to programme a value of "128" into CV 49. Next, a value of "52" into CV 50. Last step is to programme a value of "113" into CV 56. Power off the track, and then power up the track. Your loco should be quiet until you dial in its restored factory default address "03" (part of what you just accomplished with the reset), and then you should hear the decoder begin to make its sounds and it will respond to directions to move the loco.
With my BLI AC6000CW, I can hit "F8" on my Digitrax Zephyr controller and the sound will fade in and out (turn off and on). Hopefully, this might be the issue in your case. Oter than that, I would read the manual to find a "reset" option.
Hope this helps!
-Brandon
I see...
I have an MRC aswell.
Maybe you should can hook up your DCC system and give it a try (at least on a small test track).
Jerry,
The locomotive or the sound stopped working? If may have hit a short and reset...
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
with my sound system, if I press 0 twice(like doulbe clicking) the sound turns off/on.
Does your control system have a "sound on/off" variable that you may have accidentally turned off?
Sometimes it's something simple like that. (let's hope so for your sake).