Steve-1322233

Blast ….. thought we had cracked it then! Got to lay on a bus replacement service until then!

So, I have had a friend with a multimeter check things out …. Advised no shorts etc and all ok so I took the plunge and installed 21 pin decoder in a HST just bought and inching to use. With much trepidation I installed and hey presto all was wonderful for the weekend, today I realised that I had hadn’t installed a power back that I had, plugged in and the decoder blew again. Thinking about it when I tried to install others that blew had THE SAME powerbank in ……. I am assuming this is the problem, you knowledgeable people out there could the powerbank do this ? see photo of the area the decoder blew cheers all

Thanks …. Need to buy a multimeter I guess! You say that a new decoder would pop straight away if put onto the powered tack a with a fault, I have 4 locomotives that are running very happily on the track, I would have thought they would have blown if that was the case? thanks for all the advice everyone very much appreciated 👍

No, Just the R7337 power bank install, then put on the track yes, HM7000 8 pin decoders, the wires / leads (whatever you want to call them) soldered onto to the pins as straight out of box all locomotives where non ring field ( Hornby class 50, HST from 2010 and a class 33 Heljan black wire

Hi all i have in total 4 decoders all fitted with no problems and locos running faultlessly. Installing my 5th in an old Class 50 and then putting on the track I noted a puff of smoke from the decoder and before my eyes a wire that was soldered to one of the pins popped. i contacted Hornby who where helpful and asked me to send back. They said the loco circuit was to blame and as older model some 12 years old plus unable to help but sent me a new decoder. I tried to install on an other loco this time a modern model but the same results of the decoder smoking and the wire solder breaking. I contacted Hornby who in fairness asked me to send back the decoder and I await comments. I have 3 more chips awaiting installation but dare not until found out what if anything I am doing wrong! I run off Hornby H&M 7000 transformer only. When I install all other locos etc of off the track my other chipped locos running well in the mean time on the same track. Any ideas anyone please? cheers