Dead MTH Railking Big Boy

My Premier stopped once during testing my track layout design when the wire draw bar coupler came loose.  I pushed it back up and things ran fine.

Tether might not be seated.  With tender open, pull and reinstall all plugs on the board.

I just did what Marty suggested and no change except when I put the tender without the cover on the track and connected to the loco there is a very audible hum (sounds like a 60 cycle hum to me) at a very low transformer power setting.  It goes away as I turn the power up???  I cannot tell what component is humming but it seems to be on the main board?  Not the speaker, etc.  

Could be a bad capacitor.

Dale H

Does anyone think the BCR failed?  

I do not like them.  Try it with the battery that came with the upgrade kit.

I purchased the loco from a friend and it didn't come with a battery, just the BCR2.  I can put together a 3V battery pack tomorrow and try it.  3 volts is correct, isn't it?  

If the hum is a blown audio amp you need to not continue to operate unless you have a amp meter on your transformer to measure current draw.

Best bet is to have the board tested, before further damage to the boards.

Audio amp can be repaired at the component level, as long as it hasn't shorted and remained shorted for extended period.   G

The battery should be a 2 cell 2.4 volt. (2 x 1.2)

Rod

I would follow GGG's advice. He helped me recently with my Railking Challenger and did a great job fixing it for me - replaced various componants on the board and smoke unit - and I live in England!! Thanks George.

MIKE