[HM7000 LOCOS LOSE POWER SOON AFTER STARTUP]

First time on the forum!  I have several HM7000 decoder-equipped Hornby locos that link on the HM DCC app and start up OK with sound and movement - but only move for a few inches and then go dead.  I could understand if it was only one loco or decoder that was behaving like this, but not 3 or 4.  I am using the Hornby AC Adaptor R7337.  Any suggestions?  Thanks.

[HM DCC App cannot find 2 locos at once?]

I have installed new 8-pin sound decoders in 2 locomotives and they both work fine. However, I cannot seem to connect them both to the App at the same time - it's either one or the other.

Please let me know if I am doing something wrong, or whether there could be problems with the decoders or the App.

Many thanks.

[Railmaster Android application issues]

I have tried to download HH for Android on my Nexus 7 from my-apps.eu and the response is that I must use Chrome v35.  I am on Chrome v41. Do I really have to uninstall v41 and attempt to install v35 - which will probably want to auto-upgrade anyway?

New to DCC - any advice welcome! Thanks.